KISSfn
Fish Herder
Since my Eheim is rated at 132 gallons/hour, my tank is 50 US gallons, I've read here a 5X turnover/hour is recommended and after gravel vacuuming yesterday noticing a bunch of nasties in the gravel I presume my tank is underfiltered/undercirculated. So, should I get an additional filter or a powerhead? Thanks in advance!



