Hello, Well i need some understanding and help with my new 150b Pengin (mispelled) Bio-Wheel. Just yesterday i finally got my biowheel in the mail, and i got it all set up. Well i'm new to this fish stuff, so i want to know when it will start destroying ammonia and nitrites? I make about 2 15-40% water changes a week and my nitrites will not come down. The weird thing is that my fish aren't that different, only once in awhile one of my fish will sit at the side and just float, but in about 5 minutes or less it's back to normal. And here are my stats: i have a 10g tank with 5 barbs and a silver dollar, a 150b biowheel, and a 5-15 whisper filter. If anyone can please help please do, I would greatly appreciate it!!!! :help: