With all the bleaching you've experienced, and SPS
with black polyps, and algae issues, I've really been scratching my head about your situation, since you had said your Radions were at 10%. Couldn't get my head around what could possibly be going on. Even making me second guess LED
, altogether. 100% power explains it all, figuring this out should help you all around. As long as you stay up on your less than desirable water source, you should see a drastic turn-around.
Best of luck, Hank!