Quote:
Originally Posted by VaughnH
You can try adding more surface disturbance. Aim a powerhead or other flow source more towards the surface so you get light rippling. That will cause more of the CO2 to be lost, and reduce the ppm somewhat. I doubt that a drop from around 40 ppm to around 30 ppm will cause an algae bloom.
Just to be sure about your conditions: are you using 4 dKH distilled or deionized water in the drop checker and not tank or tap water?
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Thanks Hoppy
I don't know about adding another power head. I already have two Hagen Elite Subemersible filters modified to act as diffusers and combined they are providing quite a bit of circulation. Additional surface agitation is being provided by the Aquaclear 150 HOB filter.
Perhaps I will set an airstone attached to an airpump on a timer and run it at nightime only when c02 is not as critical for the plants.