I never used ph controller and never had air stone in my planted tank. now im setting up a new 100G tank with aquasoil and soft water (gh 3, kh3 )and installed PH controller. before any co2 injection the PH is 6.3-6.4 (reading from the ph controller) i set the controller to shut off the co2 at 5.8 (i know that by the kh/ph table its a lot - but i dont trust it). i would like to add air stone as i would like to introduce a few species of shrimps and heard they need good amounts of oxygen .
Now my question is that : if i add air stone to the tank during dark hours - will it give more oxygen to the water? i think its like driving a car with one leg on the brakes and one leg on the gas... but still want your opinion?
Will it make the controller work harder to achieve the desire PH (and co2 levels)? i dont mind loosing CO2 for nothing but would like to keep my shrimps alive!