algae like most plants photosynthesis during the days turning co2 into o2.. but at night (and sometimes on cloudy days) do the opposite via cellular respiration.

esshup's is right that if you have a lot of algae the top algae may be photosynthesizing but the algae below it may not be getting light.


The problem is that the algae is feeding on your high phosphorous, but it is also using it up.. well not using more like locking it up.. when your algae decays it's going to release those nutrients back into water, what is going to use it then?



Last edited by bcotton; 06/18/14 05:57 PM.