Fish mysteriously dying?

Jul 11, 2009
21
0
0
Ohio
#1
My tank is a 30gal, fish include: 1 Ghost Knife Fish, 2 Neons, 2 American Flag Fish, 1 Green Phantom Pleco, 2 Dancing Goby's, 1 Red Tail Shark, 1 Dwarf Gourami, 1 Glass Catfish, and 1 Half Beak.

I know that my Ghost Knife Fish is a bit big for this tank right now, I'm working on getting a big one, although he seems to be quite fine and loving my tank. As of lately, I probably had too many fish really... but I had a smaller Pitbull pleco who was fine until several days ago he passed, then next to go was my Anablep (just recently purchased as well) and then after that was my Twig Catfish, and today my other little Half Beak. When I took my Anablep back to the pet store they tested my water and she said it didn't seem like anything was wrong with my water. "Maybe it was of stress?" she says. =/

My Dad has a 75gal tank with WAY more fish than he should so I wasn't really worried about how many fish for the space I had. My Dad's tank is fine and no fish of his seem to be dying, but mine just keep dying off.

My Green Phantom Pleco is starting to lose some of his color and this really worries me, not to mention he was super expensive!! When I first got him I was worried because he never moved from under the rock I've got. Recently he's been moving around everywhere, so hopefully that was a good sign. I've got algae wafers that I put in there to make sure he gets enough food. He's gone back to just laying around in one spot and his tail seems to be fading a bit to white. My Red Tail looks like he's getting a little lethargic and his top fin he barely raises anymore. Other than that my other fish seem to be going fine. For my Ghost Knife Fish being the biggest in the tank and the one to seem like he'd be unhappy with the amount of room he's got he seems perfectly fine. He hasn't changed any habits and as far as I know he looks like he's loving it. I'd be devastated if I lost him, that's for sure.

A few days ago I did a water change for the fact that my water looked super cloudly, it was almost impossible to see through my tank. It looked like someone had poured hot water into my tank. My tank's temp is at 78 and I have a testing kit... pH is at 8, Ammonia is at 0, Nitrate is at 5, and Nitrite is at 0. Nothing is too out of the ordinary, my Nitrate has been at 5 since I've had the tank which is probably over 2 months or so now, but only has it been in this past week that all of my fish are dying. My water looks a lot less cloudy now but still looks as if it's got floating particles in it? There's been a brown algae or diatom possibly after researching that has been growing on my fake plants and rock in my tank. Everything I've read has said this is not a problem.

I'm just at a loss for words at all of my fish dying within a week. Just hoping I don't lose anymore, especially my bigger fish, that cost a lot. Does anyone have any ideas of what could be happening? Oh and not sure if this matters but it's almost seemed as if lately there are more bubbles from my air stone resting at the top of my water. Not sure if that's a good thing or bad, or neither really? Just worried about my lovely fish and trying to save the ones I've got left. PLEASE HELP!!! Thank you!
 

shanec

Small Fish
May 2, 2009
43
0
0
Ireland
#2
have you cycled your tank before you put your fish in?

neons need a group of six or more..and will probably b eaten by ur Ghost Knife Fish...i dont no alot about the other fish u hav in there..


as for now do a partial water change of 30percent and research the nitrogen cycle and cycling a tank...what fish are still in the tank?
 

Last edited:
Jul 11, 2009
21
0
0
Ohio
#3
Yeah I let it cycle for about a week before I put any fish in it. It's a 30gal, as I stated. I just did a water change 3 days ago, I heard it wasn't good for the fish to keep doing water changes. Plus the next day when my Anablep died I did another water change. The first water change I also cleaned the gravel, the second water change was purely just a water change.
 

shanec

Small Fish
May 2, 2009
43
0
0
Ireland
#4
its not good to change more than 50 oercent as your tank may go into another cycle

did u add all your fish at once?

and cycling take up to a month

ur tank cud not hav cycled
 

Jul 11, 2009
21
0
0
Ohio
#6
Everyone says the Ghost Knife Fish is aggressive, mine isn't. I had 6 neons, only 2 left. Not because anything was eating them they just kept dying off when I first got them, it was odd. These 2 have lasted for quite some time and seem to be doing just fine by themselves. I didn't really want them in the first place just needed something to swim around and I actually thought my Ghost Knife might eat them, which I was hoping. =) How cruel of me.

All the fish have been added at different times. I've had the Ghost Knife the longest, all fish were added in at separate times.

All of the fish I listed in my first post are the fish that are currently in my tank. When I first went to just look at fish the people in the store said to let me tank at least cycle for a week, I did that then added my Ghost Knife who was in there by himself for a week. Then gradually new fish every so often. The only thing that's really changed about my Ghost Knife is the fact he swims around more during the day than he used to, but other than that he's been acting fine, so for being the first in the tank he's doing just great!
 

Jul 11, 2009
21
0
0
Ohio
#7
I think my Green Phantom pleco is looking alright, it might have just been the lighting and the angle he was laying. He moved over to a different spot and seems fine. I just don't want anymore fish to die on me! My Red Tail Shark is being a little lazy, but his tail is still bright orange (or red, whichever you prefer), and if there's as problem it usually fades to a very light pink color. I could be worrying too much, but with 4 deaths within a week, I'm paranoid!
 

shanec

Small Fish
May 2, 2009
43
0
0
Ireland
#8
no...if your goin to add fish and do a fish in cycle you let the tank run for a week
then add fish which mean THEN the cycle begins

the cycle wont start till you add a fish or food or somthing to produce bacteria

pet stores are noturious for wrong info...and all they want is to maek a sale..knowing when most people realise they haf a wait ahead..they wont buy they tank

some hardy fish can survive the cycle...but when u keep adding fish as you did..u keep starting it over and over and overloading the bioload...

your ghost knife is obv young as they always are..when he gets big hell get a little nasty...but i dont own one im just speakin from what im told and hav read...and as for neons adding 6 at once is too many fish at once...plus as feeder fish you would b better with actuall FEEDER guppies.swimming around more hes prob acclimated to the tank...but it doesnt mean he can feel the ammonia and nitrate...ammonia can burn him and his gills and stress him out...stressed fish have lower immune systems which make then more suceptible to disease...which can b brought in by new fish or can b dormant in the water.

you need to look up all the fish you own...not once but for a while and look at a few diferent profiles
all fish have diferent needs and diferent temperments and need diferent tankmates...google can tell you all of this if you type in a few keywords and search...youl need to buy a test kit to test ammonia nitrite and nitrate...or if your dad has one borrow it...when youve finished readin about the cycle youll no what i mean...

btw cloudy water is often caused by a large ammonia spike
 

shanec

Small Fish
May 2, 2009
43
0
0
Ireland
#9
ok well catfish and bottom fish often hide...its in there nature

just read up on each fish and the cycle...and hopefully your fish will b alryt...for now the best thing is a water change...and another next week..or mayb a bit sooner
 

Jul 11, 2009
21
0
0
Ohio
#10
Thanks for your hints and tips. I already tested my water, which I stated. Ammonia is at 0, and the place I took my dead fish back tested it and also said the same thing. The only thing is the Nitrate is at 5, everything else is fine.

What you said makes complete sense though, thanks a lot. I won't be adding any new fish anyways, this is all I need for right now. I'll keep you posted if anymore decide to pass away. =/
 

shanec

Small Fish
May 2, 2009
43
0
0
Ireland
#11
ok sorry i flik trhough thinkgs somtimes i really must stop lol

well in that case...du u use conditioner for your water...mayb ur ghostknife was actin up at night..its not unheard of for predatory fish..

sorry for statin the obv but alot of the times its the problem hah


if your tank has finished the cycle...it must of taken its toll on some of the fish...and made acclimisation harder for them...fish can die after bein exposed to improper conditions at stores aswell...even after a week or so in a stable enviorment...
at one of my fish stores they have mbuna cichlids in a tank with a massive piece of drift wood(giving them slightly accidic water instead of slightly akaline)...and when i bought my bolivian ram which is a peacfull cichlid for community tanks...its was in with a baby convict which was bigger than it lol
 

MissFishy

Superstar Fish
Aug 10, 2006
2,237
5
0
Michigan
#12
Ok, I read the first main post. First of all, you have WAY too many fish in there. With fish as expensive as that, I would NEVER try to cram them all in a 30 gallon tank. They are likely dying from stress and poor water conditions. A tank does not cycle within a week, it takes up to 2 months to cycle. A lot of the rare more expensive fish in your tank are very sensitive to water conditions, so the slightest thing could throw them off and kill them. My suggestion is to return most of them to the store for store credit, decide what exactly you want to keep in your tank, and stock it accordingly, after cycling it completely of course. Take a look at the link in my signature on cycling and stocking a tank properly and let us know if you have any questions.
 

Jul 11, 2009
21
0
0
Ohio
#13
Yeah, I think the death of the Anablep was definitely other fish picking on him. The Ghost, being mostly blind doesn't realize it and runs into the top feeding fish. And my Gourami and American Flag fish are somewhat aggressive, I fear they all may have been picking on him, which was most likely the cause of death combined with stress of being new to my tank, and quite possibly I shouldn't have bought him. I couldn't resist, he was adorable! As for my dead half beak, I think he didn't eat much. I got both half beaks at the same time and one is quite larger than the one who passed, he hid behind the filter mostly, in fear I'm assuming. I never saw him eat much... so perhaps starvation? And yes I do condition my water.

As for MissFishy, I'm not really concerned about having too many fish for my size of tank. I'm not much of a rule follower. Not to mention I don't see "poor water conditions" as my water levels are pretty normal. As stated my dad has a 75gal tank and is hugely over crowded yet his is doing just fine. Not to mention you can't just return the fish for a store credit, especially when having them for as long as I have now... nor do I want to return them. I love them and I think they're all quite settled for now. When the time comes perhaps I must upgrade to a bigger tank, but not now. Thanks for the suggestions, and by any means am I saying you don't know what you're talking about but I like my tank the way it is. This fish place nearby me knows a lot and always tells me not to do the things I want to do but just because it's the "norm" doesn't mean I must follow. We have 2 other 75gal tanks in my house, Dad and Brother, both of them just do what they want for their tank and it seems to work out well.

I think my tank is finally at the point of the perfect fish for it. Rules, Rules, Rules... not much for them!
 

1077

Large Fish
Jun 4, 2009
175
0
0
#14
You could speed the maturing or (cycling) of your tank by borrowing some filter material or gravel from either your dad's tank, or your brothers tank and placing this material in the filter area of your tank. this material would help seed your tank with beneficial bacteria and reduce the time needed for the tank to mature, or (cycle)considerably. Place the material as stated,,in the filter of your tank and leave it for at least two weeks.
There are some rules that if not followed,,result in sick or dead fish. but I suppose if you are willing to keep buying fish to replace the ones you kill,then your local fish store will ALWAYS be happy to see you.
RULES for HEALTHY fish...
Weekly 20 to 25 percent water changes. (includes vaccuming gravel).
Not overstocking or overfeeding.
Research the fish BEFORE you buy them to ensure compatibility and to see that they enjoy the same temps,and water parameters =Hardness,alkalinity,or acidity. GOOD LUCK.
 

MissFishy

Superstar Fish
Aug 10, 2006
2,237
5
0
Michigan
#15
So basically, what you're saying is that your fish have been dying in droves for a week now, but this is a mystery to you, because you don't have time for basic fish keeping rules followed by a majority of hobbiests. Yes, fish stores take fish back all the time, many keepers return fish as they get large. The large chains won't take a fish back, but your local fish stores get a great many of their larger specimens by "buy backs" from customers.

Please don't give anyone advice on here if that's the attitude towards basic humane fish keeping you're going to have.
 

shanec

Small Fish
May 2, 2009
43
0
0
Ireland
#16
i would take missfishy's advice...

ive read alot of threads were she's given alot of good advice and that advice has some of the time helped me...*thumbsup2
thankyou for that btw lol*thumbsups
 

Jul 11, 2009
21
0
0
Ohio
#17
If I've already started off badly, I can't really go back now. The stores around here only take fish if you GIVE them back. So therefor I'd be getting no money back. The fish that did pass acted a little funny the day or so before so I predicted it... they all seem to be doing pretty good.

Yes, I came on here for advice, but just because you give me your advice doesn't mean I have to follow it. I just wanted people's ideas and opinions. After all it is MY tank so I shall end up doing what I please with it. I know plenty of people who know a lot about tanks, and yet still everyone says something different. I appreciate all the input I've got, and I will take some of it into consideration. Or use it for later tank set ups, etc. Don't get all upset with me just because I nicely said I wasn't going to follow your advice. People are always going to end up doing what they want with their tank, whether it's put too many fish in or put fish together that shouldn't be, etc.

I already had stated in my original post I felt I had too many fish, so this is something I already knew. For now I'm just going to go with what I've got and see where it goes. As for now I have said I don't plan on buying anymore fish, I'm happy with what I've got in there. The main reason I don't have enough room is my Ghost Knife since he gets the biggest. That's really all that pushes me over the sufficient amount of fish for my size of tank. And who's to say I won't upgrade to a bigger tank in time, just not right now.
 

blue_ram

Large Fish
Jun 21, 2008
516
0
0
Florida
#18
An over stocked tank must be over filtered, if you choose to keep it over stocked, you must add a larger or additional filter.

The best way to ease the cycle on the fish is to add a plant or two. Amazon swords are great because they will pull ammonia and nitrite from the water column. Java fern is a good choice for fish that eat the plants.

Predatory fish should never be kept with non predatory fish.

Gouramis are not aggressive fish and should not bother any other fish.

The Flag fish is a known nipper.

Incompatible fish will cause stress and stress will cause diseases which mean dead fish and often fish that die quickly. Do you have places for the fish to hide?
 

blue_ram

Large Fish
Jun 21, 2008
516
0
0
Florida
#19
I think my tank is finally at the point of the perfect fish for it. Rules, Rules, Rules... not much for them!
While I agree that some in this hobby can be overly pedantic, certain best practices in this hobby cannot be ignored.

Among these, the most important is maintenace of water quality and parameters and fish compatibility. These are not rules, they are facts and vital to the long term survival of your fish. if you disregard these facts, you will end up with dead fish.
 

jo3olous

Large Fish
Aug 6, 2008
909
1
0
Philadelphia, PA
#20
Yeah I let it cycle for about a week before I put any fish in it. It's a 30gal, as I stated. I just did a water change 3 days ago, I heard it wasn't good for the fish to keep doing water changes. Plus the next day when my Anablep died I did another water change. The first water change I also cleaned the gravel, the second water change was purely just a water change.
A Tank takes more than a week to cycle; about a month at least. If you cycle it with fish it could take 2 months or even longer to get the bacteria going and the water right.