I have two tanks that have been setup for a good 6 months now and both of them(75 and 54 gal) have terrible green water to where I can hardly even see the fish unless they're right up front.As I'm typing I have my 75 emptying.I took the single Dovii out and put a quarter or so cup of bleach in there and let it cycle before emptying it.Im gonna fill it back up with hose water,empty it again to get as much bleach out as possible then refill it and treat the water.Is this logical or not?I've had tanks for 15 years or so and never really had this problem.Please help!!