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clearleaf · 07-01-2009, 04:54 PM

If you can point the outflow in the direction towards the surface this should agitate it enough to keep the surface from filming over. Granted, this dissipates some of the CO2 produced by the substrate and fish, so...double edged sword deal. I guess just try and angle the outflow so there is a little 'roundness' to the surface of the water, should be sufficient.

07-01-2009, 04:54 PM	#4 (permalink)
clearleaf Senior Member Join Date: Oct 2008 Location: Seattle, WA Posts: 120 iTrader Ratings: 1 iTrader Positive Rating: 100% Plant Points: 7750	Re: Biofilm removal on surface water If you can point the outflow in the direction towards the surface this should agitate it enough to keep the surface from filming over. Granted, this dissipates some of the CO2 produced by the substrate and fish, so...double edged sword deal. I guess just try and angle the outflow so there is a little 'roundness' to the surface of the water, should be sufficient.