Hello, i currently have a rena xp4 on my 135G freshwater tank, the filter itself works great, very quiet, easy to clean, plenty of room for media
however, the flow rate even when clean doesnt seem to be the advertised 450 gallons per hour and i'm wondering if it is cleaning the water enough, when i first started researching this size tank most suggested 2 canister filters
what i am wonder is if i did add another filter i dont want 2 tubes out and 2 tubes in, can you or has anyone run filters in tandem? (see my crude illustration below
) what do i need to consider if i did it this way? the same size canisters? a lower GPH
filter as the first one? a "pre-filter" of sorts?
any advice or suggestions appreciated