To those who have apparently found success with high light, high CO2, and ferts. Once you get this thing where everything is matched and your growth is optimum, how often do you have to prune? When I pruned, I was removing a significant amount of biomass. Do you trim lightly but very often or do you prune heavy less frequently. What is the best method of pruning to keep the right balance, and keep the tank looking at its best.