Ok guys so here's what I'm asking, I have four pumps on my 110 gallon high tank. Two which are penguine 350's HOB and two Rena xp2's. One of the HOB's just died and I wanted your thoughts as far as replacing both hobs with one or two more canisters or just Getting rid of the hobs and just run my two existing xp2's? My only concern is having enough filtration still and having enough water agitation with just the 2 canister filters. Keep in mind that all my filters are behind my diy background. What would you guys do?