Maurice Posted September 22, 2017 Report Share Posted September 22, 2017 Hi Guys, Just out of interest, do you have your sponge filter's uplift pipe above the water surface or underneath? And is there a reason for your choice? Lastly, is there a big difference having it, or above or under the water surface Quote Link to comment Share on other sites More sharing options...
oem Posted September 23, 2017 Report Share Posted September 23, 2017 Hi Maurice, The pipe's on my HMFs are at surface level. I think it helps to keep the surface moving for transfer of NO3, ammonia, and other problems away from tanks. I have thought about sub-surface/ half under surface in the past but figured I would have to put a barrier on it so shrimp would not swim behind filter. Thinking about it now, half under would give me more water volume in tank but not sure that would be beneficial. Need to do some math.,,,, Mike Quote Link to comment Share on other sites More sharing options...
Shrimple minded Posted September 23, 2017 Report Share Posted September 23, 2017 Maurice, I have my double-sponge filters right at the waterline......half in, half out. For all of my regular (hydro) sponge filters they are 1-2 inches below the water surface. I don't see any notable differences in either setup. Quote Link to comment Share on other sites More sharing options...
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