i have white clouds in a fairly newly established tank (a month or two) and they used to swim in the top of the tank near the water surface but lately they have gone completely to the bottom almost laying on the gravel. they still swim around and everything but i dont think they should be swimming this low, because generally this type of fish swims near the very top. i have test kits for ammonia and nitrite and thats not the problem. i think there is some brown algae in my tank. could this be the problem? also, i recently found fry in the tank if that matters....im worried because they used to go to the top whenever i opened the top waiting for the food and would immedietly eat it all up but now i find more and more food is falling to the floor...also it could be my imagination but they seem a bit skinnier 