Often people will ask a multitude of questions when you ask them a question. So here are my answers:
Filters) I have an Emperor 280 biowheel on my 38G at all times and a Topfin 20. My 20G has a Whisper 30. I rinse filters in tank water when doing water changes if necessary. I seed new filters off of my main tank prn.
Water parameters) nitrates 20 from the tap
KH total alkalinity= 80ppm pH 7.0
I use prime dechlorinator