Unexpected Death.. HELP!?!

[breebrry]

For almost 2 weeks my 10g has been fine I had 4 Serpae Tetras (long finned) and I reduced down to 1 emerald cory cat. I check the water every other day or two and it has been fine. I did a 50% water change the other day because the fish seemed to be swimming slightly at a tilt and they seemed better afterward...

again I have been checking the water and 2 days ago i come home and have a dead tetra stuck in a plant.. and so i did another 25% water change..

tonight I come home and one of the last 3 is sucked to the filter.. I have no idea whats going on.. but I just did another 50% water change..

I am thinking this may have something to do with my water. I am noticing mold growing on the plants in the tank. I know it is mold because it is black and it grows in my washer and toilet too.. could this be what the problem is?

If so I will go buy gallon jugs of spring water so they have better quality water...

please help..

down to 2 long finned serpae tetras and 1 emerald cory cat

 

[homebunnyj]

Did you check your parameters? When, and what were they?

 

[Hoontar]

Has your tank been cycled properly? It sounds to me like some new-tank-syndrome + stressed fish

 

[blamejames]

i agree with Hoontar also you might want to invest in a RO/DI with UV filter to take care of that hard water with mold! I also probably wouldnt drink the water let alone put it in a tank unless it has passed through the filter mentioned lol!

 

[OrangeCones]

I check the water every other day or two and it has been fine.

What are the actual readings for ammonia, nitrite and nitrate?

How are you checking the water?

 

[LadyLail]

If mold is growing in your toilet and washer, your fish dying may be the least of your problems. Have you had your water checked? Most water plants should provide a test kit and check teh water for you for free...