I am setting up a 20 gallon high tank (16" high, but after less substrate, it is only 13" high), with a Coralife 65w PC
light. If I let the light on 5 or 6 hours per day, do I need have pressurized CO2
? I have low-medium light plants.
I am planing to have shrimp and other very friendly fish like cory cat and bristlenose pleco or fry in it only. I think they may like dark more and room light is enough for rest of daytime.