I have seen this debate quite a few times here, and they have actually gotten quite heated. I think each person has to make up their own mind on what they feel comfortable doing.
As for myself, I use a solenoid setup. I turn it on 1.25 hours prior to lights and off 1 hour before dark. My Congo Tetras seem to be quite sensative to water conditions and are my greatest measure of water conditions, besides test kits. Since I have been doing this, they have not shown any stresses.
I don't know if it's necessary, but I do run an air stone about 2 hours after lights out for about 4 hours to make sure O2 doesn't get low. I really don't know if it's needed, but I don't think it hurts...
As for myself, I use a solenoid setup. I turn it on 1.25 hours prior to lights and off 1 hour before dark. My Congo Tetras seem to be quite sensative to water conditions and are my greatest measure of water conditions, besides test kits. Since I have been doing this, they have not shown any stresses.
I don't know if it's necessary, but I do run an air stone about 2 hours after lights out for about 4 hours to make sure O2 doesn't get low. I really don't know if it's needed, but I don't think it hurts...