Hello All. I am fighting some red algae and needed a little advice on my lights. I have 2 LED fixtures above the tank. When I started experiencing this problem I moved them up to about 20" above the lids. I hoped this would help. It hasn't. Water parameters are all within the recommended levels. I am trying to do more and more water changes. Currently for the last month I have been doing 15 percent weekly. I have also watched to not over feed. The rocks in the picture were just put in 2 days ago. (I had them out for over a year after a bubble algae takeover) Any advice would be appreciated! Thank you!