I have a 27g bowfront w/ fish in, penguin biowheel filter
2 mollies and 6 zebra danio's
I do water changes to keep ammonia below .5 and test with the liquid api tests
i totally geek out on the chemistry stuff, so i actually have an excel chart of my water tests for the past 2 weeks if anyone wants to see it
recently i cleaned my filter (not the wheel) and vac'd the gravel, i also started adding nitromax.
Since then my ammonia levels have slowed considerably, and nitrites have remained at zero. So im not sure if the nitromax is working, or i just wiped out all my ammonia consuming bacteria with the cleaning.