20g lighting and excel dosage?
friend of mine bought one and we are trying to figure out a good amount of light for it. its the one that is 16" tall, we were looking at a diy with cfl spirals. would 4 26 watt bulbs be overkill? the 2 26 watts he has in there now dont seem to be enough.also how much excel should be dosed in a tank this size? thanks