Hello All,
I purchased a new canister filter and did a couple flow tests that others might find helpful as there hasn't been a lot written about the effects of reducers.
Filter is a Fluval 307. Manufacture rates the pump at 1150 LPH / 190 GPH, with a Filter Circulation of 780 LPH / 206 GPH
Filter is brand new with new media, tests were done with the stock prefilter foam in place as well as the lowest basket containing the stock Bio-foam+ that comes with the filter. The other 2 baskets were empty. Filter was positioned slightly lower then the test tank. Testing was done by giving the filter a 4L head start and then timing the amount of time to remove 12L.
1st test was done with stock fluval hoses, each hose measured 1.5M (5ft) in length.
-It took 60 sec's to move 12L, which equals 720 LPH, 190 GPH. This is really close to the manufactures Circulation rating.
2nd test had the same filter setup as the 1st, but this time 13mm stainless steel reducers were positioned close to the filter (10cm away) and then 1.5M (5ft) lengths of 13mm hoses were used. As well 13mm Aquario inlet/outlet flow pipes were installed, the Aquario outlet/reliever was not used, just the pipes by themselves.
-It took 75 sec's to move 12L, which equals 576 LPH, 150 GPH.
Reducers & the 13mm hoses caused a 20% reduction in flow.
I purchased a new canister filter and did a couple flow tests that others might find helpful as there hasn't been a lot written about the effects of reducers.
Filter is a Fluval 307. Manufacture rates the pump at 1150 LPH / 190 GPH, with a Filter Circulation of 780 LPH / 206 GPH
Filter is brand new with new media, tests were done with the stock prefilter foam in place as well as the lowest basket containing the stock Bio-foam+ that comes with the filter. The other 2 baskets were empty. Filter was positioned slightly lower then the test tank. Testing was done by giving the filter a 4L head start and then timing the amount of time to remove 12L.
1st test was done with stock fluval hoses, each hose measured 1.5M (5ft) in length.
-It took 60 sec's to move 12L, which equals 720 LPH, 190 GPH. This is really close to the manufactures Circulation rating.
2nd test had the same filter setup as the 1st, but this time 13mm stainless steel reducers were positioned close to the filter (10cm away) and then 1.5M (5ft) lengths of 13mm hoses were used. As well 13mm Aquario inlet/outlet flow pipes were installed, the Aquario outlet/reliever was not used, just the pipes by themselves.
-It took 75 sec's to move 12L, which equals 576 LPH, 150 GPH.
Reducers & the 13mm hoses caused a 20% reduction in flow.
