Bio wheel 150 not enough for 20 gal tank?

  1. lfabb

    lfabb Valued Member Member

    From a thread I've read here general rule seems like 8-10x gallon for filter gph. I've got a 20 gallon tank with a bio wheel 150. Should I upgrade to a 200?
     
  2. el337

    el337 Fishlore Legend Member

    It's a tad underfiltered but if you understock and do large enough water changes, you should be ok. Personally, I would add another filter that generates 100 gph. It's never a bad idea to have two filters in case one fails or if you need one to move to a hospital or quarantine tank.
     
  3. tyguy7760

    tyguy7760 Fishlore VIP Member

  4. OP
    OP
    lfabb

    lfabb Valued Member Member

    Online I found a bio wheel (so I can move my filters easier) 200 gph or 350. 350 overkill?
     
  5. tyguy7760

    tyguy7760 Fishlore VIP Member

    350 is overkill