Do I have too many fish or will they be ok? I have a 55 gallon planted aquarium. Soft water, PH 6.4, 80 degrees, Ammonia 0, Nitrites 0, no CO2. For filtration I have an Aquaclear 300 and a Eheim 2213. I don't use carbon. I also have two hagen double sponge filters. My residents: 2 koi angelfish, 10 rummy nose, 10 cardinals, 3 albino cories, 5 julie cories, 2 panda cories, 5 otos, 5-6 amano shrimp, 1 neritina snail (best algae-eating snail ever). Lots of driftwood and plants. Is it too much for the 55 gallon? I was going to get a 75 used but didn't trust getting such a large tank used, too much potential for horror. Thanks for your advice.