I've got a rather nice setup of a 75 gallon tank thats housing 3 res' each about the size of a nice lime in size
My question is.. i have 2 canister filters on each end of the tank, both of which are a Penn Plax Cascade 700 series.
It seems when i have to stick my hand into the tank to anchor down the heater they have managed to knock loose with their horsing around, the output pressure seems to be on the weak side.
Ive done a cleaning of the filters and it seems to be ok for a while then kinda decreases.
Is this normal behavior? Or do i need to consider some other kind of filtration in the tank?

