test results are .5 ammonia 0 nitrites and 0 nitrates maybe a few ph 8.4. I did 4 gal water change at week 1 2 and 3 and haven't cleaned the filter or the gravel. Ive been testing every day or every other day. 3 zibras 3 black fin tetras seems to be going rly slow. Got some seeded gravel from the critter store as they said it should be spiking in nitrites by now. 20 gallon tank with 6 small fish but seems to be stuck. It has a topfin filter that will get modded with bioball bag and just the sponge after it gets established. We use charcol whole house filter with a softner and I dono if that's stalling it out. I still use the declorinator in the top off water and when we set it up. It seems wrong. I don't use the strip test kit but the master freshwater kit. What do you all think?