Tell me, why are you on a fish forum where you know people have FISH and you tell them to leave them in the ocean? Why are you even here? If you have corals I'm sure you are replenishing the ocean with the frags right?
Better late than never, but...
Look into an Algae Turf Scrubber (ATS). I've been running one for over two years and water changes are rare. My last real water change was nine months to a year ago.
I agree, putting your money into your equipment will save you loads of money down the road. High end skimmers like Bubble king are a way to take a load off water changes. I only do then once every 6 months just for kicks. I really could get away with a whole year IMO.