View Full Version : filter help

11-21-2004, 07:28 PM
i just got my 77 gallon setup and there isn't enough room on the back to hang up a power filter. i read that a 77 is big enough for a canister fitler but i dont know if these hang on the back too. do they hang on the back? are they in the water? i have an underground filter with 4 power heads that came with the tank. is this enough to where i don't need another filter? how do they powerheads work and do i ever need to change anything on them? i apprecite the help.


11-21-2004, 07:45 PM
here's a pic of the intake tube of my rena xp2 on my 75

11-21-2004, 07:47 PM
and here's the output situated about 3 feet away from the intake

11-21-2004, 08:35 PM
Cannisters sit under the tank but two tubes enter the the tank somewhere (usually the back or side).
Why won't a hang-on-back (Aqua Clear) fit on the back?

11-21-2004, 10:31 PM
because i have it too close to the wall

11-21-2004, 10:46 PM
use a fluval 203/304 as well as your power heads, would be good. also how many fish and what fish do you keep? also your power heads dont need much maintanence, just open them up (by pulling apart) once a month and clean the impellor and magnet. the power heads work when attatched to undergravel pipes like yours quite well. there is a plate below your gravel attached to that is 4 pipes and on the ends power heads. the power heads suck water from these tubes and re-release it, thus your gravel is your filter media. i would add an activated carbon AND bio based filtration to the mix for bigger fish. like a canister with amo kill in it as well as the usual media it comes with (fluval 204/304) good luck

11-21-2004, 10:49 PM
i have about 15 african cichlids. they are all small 1-4 inches and i have two huge plecos. will i have enough room for the pipes. i have about 3 inches of room behind.

11-21-2004, 11:43 PM
You'll easily have enough room for the pipes for most of your major canister filters. Try & get one that'll turn over your tank at least 4x per hour - ie 77g = filter with flow rate 308g per hour. The Fluval 304 agez recommended does 300g per hour so would do nicely. Especially in tandem with your powerheads. You can pretty much never have too much filtration for cichlids, (you can have too much current though obviously.)