sump vac?

seastaar88

Superstar Fish
Feb 1, 2004
1,705
1
0
43
middletown, CT
#4
if you're going to go to the trouble of setting up and running several hob and canister filteres, why do you object to just setting up a sump? sumps offer many advantages such as additional water volume which keeps perameters more constant, you can hide all of your filtration within it such as bioballs, filter pads, carbon, etc to name a few. plus the water turnover in sumps vs hob/canister filters is typically more. plus you can more easily plumb in other things such as fluidized sand bed filters or lifeguard filtration systems.
 

#8
To awnser your question, yes, you could go with two cannisters, provided they were large enough. I'd use at least two FX5's or Eheim's equavilent.

BUT, like everyone else has said, if you're ready to go to that much trouble, why not just go with a sump? it would be both cheaper and easier than multiple cannisters. You don't need to buy a prebuilt sump either; another fishtank, or even a rubbermaid container will do nicely.
 

seastaar88

Superstar Fish
Feb 1, 2004
1,705
1
0
43
middletown, CT
#9
http://www.myfishtank.net/forum/showthread.php?t=33587
http://www.myfishtank.net/forum/showthread.php?t=33934

masta --
yahoo is planning on building a glass tank to house a clown knife assumingly using diy instructions on garf.org

yahoo --
a wet/dry sump can run you between $100-$200 depending on size and initial cost for filter media & bioballs. keep in mind, however, you can also DIY sumps much more cheaply if you have the time and handyness. i'd recommend a sump of at least 50G, but preferably more like 100G. the bigger the better, just like tanks. some will use something as simple as an old fish tank as a sump. typically, a lot of people will chose the size of sump based on how much room they have under their tank cabinet. if you are really handy and are allowed, it's best to plumb the tank so that the sump is in your basement.

with a tank your size, you'll need to keep weight in mind. a 700G tank with just water in it is over 3,500 pounds.
 

#10
Seastar, to be a little more precise... a tank that holds 718 gals is goiong to weigh about 6,250 lbs... a gallon of water weighs approx. 8.7 lbs x 718 gals=6246.6 lbs... but I saw on 1 of Yahoo's other posts that he is planning on putting the tank on the floor in his basement... howdo ya think he can get the sump below the tank level ? IMHO he is gonna have to find some one to build him a nice strong steel stand for this tank of his so that his sump or canisters for that matter will work properly.

Question: Yahoo, if you build this tank in the basement, do you have a feesible plan to remove it if your family or you for that matter decide to move?:confused:
 

seastaar88

Superstar Fish
Feb 1, 2004
1,705
1
0
43
middletown, CT
#13
haha my bad... i was using an easy 700g x 5# calculation in my head. at any rate, it's heavy! ;) ;) ;) ok brak, i must have missed that point that his tank is going to be in the basement. on the floor even. you could still have a sump next to it, it would just require the use of pumps and tweak things with ballvalves and hiding an in-tank pump behind a backdrop.
 

#14
dont sumps have a pump, like HOB filters that force the water, or is it like a siphon thing? i dont know how to build a stand to support that much weight. any ideas? it sounds like there will need to be a stand for a sump to properly work. how would i go about plumbing a tank? i assumed it was all like a HOB filter type pump hooked up to a huge filter...
 

#15
You don't need a seperate stand for a sump, most people lay it on the ground/floor, under the tank's stand. To plumb it, you need either a overflow in the tank(Basically a hole in the tank for wter to flow through), or a HOB overflow box. Does the same thing, but you don't need to drill holes in the glass. Beyond that, you need piping to go from the overflow down to the sump, and a pump IN the sump that pushes water back up to the tank through more piping.
 

hyunelan2

Large Fish
Jun 1, 2005
684
1
0
45
Near Chicago, IL
#16
yahoofishkeeper said:
i dont know how to build a stand to support that much weight. any ideas?
I would say, don't even try. If you're not a structural engineer, it will be dangerous to build something made to hold up 3 Tons of weight. I would say this type of stand would need to be made out of welded steel, or reinforced concrete. Know any iron-workers?
 

#17
I don't think it would be impossible. It's a lot of weight, but it's spread over a fairly large area. I'd definately go steel though. If you know someone with a welder, just find some square tubing (Square stock) and make sure there is LOTS of bracing!

Edit: By bracing, I mean tubes on a 45 degree angle, between the 90 degree joins.
 

#20
To reply to your first post, No, you don't need a really powerful HOB... gravity does that part for you;)

The water just flows naturally down to the sump, you just need a pump to bring it back to the tank.

For a stand, I'm very doubtful wood will take that kind of weight for long periods of time, unless it was engineered to do so. Unless you're a structural engineer, you need to find someone or a shop that will weld a stand for you.