Go Dark
I had a similar issue at about hte one year mark running 135 gallon tank. I decided that while I was on holiday (3 weeks) I would only turn the lights on for 2 hours a day. It worked, but its a little like quitting a 20 year heroin habit cold turkey. The tank sufered, mainly the corals which survived and that was most really browned out and it took 2 to 3 times as long to get hem back to colour. I'm not suggesting you try this but wanted simply to share my experience in case you were thinking of going dark.
|