I have a 20 US Gallon Community tank with 4 Glow light Tetras, 3 Zebra Danios, 2 Glass Fish, 2 Honey Red Gouramis, 3 Bloodfin tetras, 2 Peppered Cory's.
Water temp is 78oF
Filter is a Whisper 20.
Ammonia= 0
Nitrites=0
fed flake foods once every second day.
Blood worms once a week.
Algae...