Have a 55 gallon tank with a power whisper 60 filter, i know tetra says its enough but is it really good for a 55 gallon? Also what kind of hood lighting should i be using. Every 2 or 3 days, the water in the tank evaporates by about maybe 1/2 to an inch or so, is this of the lighting or is it normal, temp is about 78 in the tank. Also my ammonia is now at 0, NH 3 is 20 NH 2 is at 0 as well, these are all good i belive correct?