Cloudy Water?

[blue musketeer]

I have a 10 gallon and 20 gallon tank.

The 10 gallon has Tahitian Moon Black sand and is crystal clear, but the 20 gallon tank is always a little cloudy... I have put a dark green background behind it which helps a little, and also add a water claryfier which also helps a little.

The gravel and tank have been washed thoroughly, but the problem still persists. 2 weeks ago the water became very cloudy over the space of 24 hours without any reason and later that week I lost 3 fish.

I have now emptied the 20 gallon and I have cleaned it thoroughly again and have started a fishless cycle until I can find a solution.

What would cause this cloudiness in one tank and not the other? Logic tells me it may be the gravel, but it has now been in place for 3 months.... can anyone help?

 

[GouramiGirl87]

I had that problem a few months ago and I had an algae bloom. I had cleaned my tank and I cleaned it too well so the algae took over. Just go to your local Wal mart or petsmart any petstore and they should have an algae remover. I only did 2 days worth of treatments which is a few drops per gallon I believe and it was cleared up like that. I hope that may help your problem if it occurs again