diy upgrade canister

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surfpalmsncycads

Fire Eel
MFK Member
Feb 13, 2010
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whittier ca
so i have some canister filters that im not impressed by there gph flow. on 3 of them so far ive taken the motors out completely. hook up canister like normal on the tank and have hooked up rio powerheads instead. flow increased 4 fold. only question is water flowing through the chambers inside the canister too fast be bad? throught the pads i dont see a problem and should perform and catch debris as it should. its the bio im wondering about. any thoughts would be great. tanks are crystal clear now. i hate seeing debris float by an intake and see it not powerful enough to suck it up.
 
Got ammonia?
If not, the bio is doing just fine.
 
surfpalmsncycads;4865559; said:
so i have some canister filters that im not impressed by there gph flow. on 3 of them so far ive taken the motors out completely. hook up canister like normal on the tank and have hooked up rio powerheads instead. flow increased 4 fold. only question is water flowing through the chambers inside the canister too fast be bad? throught the pads i dont see a problem and should perform and catch debris as it should. its the bio im wondering about. any thoughts would be great. tanks are crystal clear now. i hate seeing debris float by an intake and see it not powerful enough to suck it up.

hey may i know how did u do tat?
 
Only thing I see being an issue is possibly "short-circuiting" the filter. Not an electrical thing. When the filter media gets plugged with debris, water will seek the path of least resistance, oftentimes bypassing the filter media, usually the mechanical portion. This is often made worse by exceeding the filter design in relation to how the water passes through the media. With the mechanical usually preceeding the bio, forcing the water through this stage faster than design accounted for, could cause the water to skip this phase of filtration, allowing excessive debris into the bio media.
The only other issue I see is if you are running the filters own motor at the same time, the two different flow rates could work against each other. I have an Ehiem 2250 that I am running a 650gph pump through that is submerged in the sump and the filter is on the floor next to it. Works great, but bio-media gets more gunck than it used to...
 
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