Replacing air used by plants at night?
My high tech/EI planted 50g has been set up 1.5 months. Besides some minor issues, plant growth has been exceptional.
One of the things I'm trying to resolve is fish respiration. When I was running 30ppm, I noticed faster respiration especially in the first half of the day.
Tank has a HW302 filter, also has had a number of supplemental HOB and sponge filters, and now a wavemaker. Basically two or three sources of water agitation, however, the flow of the SunSun is probably 200gph or less with the griggs reactor.
Ive lowered CO2 to 20ppm, but I still notice some agitated breathing in the morning. My thinking is that the large plant mass is stealing ALOT of oxygen at night and the piddly water movement and bubbling is not really compensating.
I need to get serious about aeration. For those of you who are really attuned to your fish and have a large bio mass, what do you do about aeration? Is your filter turning over 10x tank size/hour?
Should I be running 6+ airstones as soon as the lights go off? Do airstones really help any more than a wavemaker at the water line creating alot of movement?
These are keyhole cichlids, probably on the larger side of fish that would be kept in a planted tank, thus its easy to see their respiration. They have never been gasping at the top, but I want the best for them.