I’ve been researching the benefits of running an air stone at night in a planted tank, I do not have co2, nor am I planning to have it and I understand that this is mainly used with co2 setups. But even without co2 it seems like it could be good to improve surface agitation at night to off gas co2 from the tank to give more oxygen for the fish as my plants will be using up the oxygen... I already have a HOB Aqueon quietflow 20 which I guess already agitates the surface, but I have modded it quite a bit (intake foam, foam on the inside, biorings and purigen) the flow seems a lot slower for sure, which has me questioning do I have enough filtration and/or surface agitation, should I add an air stone at night ? Or even better should I add a sponge filter and increase filtration whilst creating water agitation with the bubbles, but then do I run that filter only at night ? Would kinda seem weird to just do that. Having an extra filter in the tank would be a plus, as if the original filter would fail, there would a be a second one running. Is this all worth it or am I just reading too much into it?