Lindsay1718
Aquarium Advice Freak
That's exactly what i did with my 120. Great filtration is great! When I downgraded I kept a Rena xp3 for my 56 gallon . So I have 2 tetra wisper 70's and a xp3, which is rated for a 175 gallon, on a 56 gallon. I only have to keep up with filters and I vacuum it out every couple months and my nitrates never go over 10. I change the water every few months just to give them some fresh water but the parameters are never high!