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I'm not a lighting expert at all. All I can say is that it's shocking to see the huge variations in light levels under a given light when you run a par meter. Six inches to the left or right on a rockface of roughly the same height and you can see par swings of 80 or more. The sides and front and back similarly can fall way off.
At 3" off the water, you've probably got even more dramatic hot and dead spots. May well be sweet spots for various corals.... just that the human eye can't see it.
I'm not a lighting expert at all. All I can say is that it's shocking to see the huge variations in light levels under a given light when you run a par meter. Six inches to the left or right on a rockface of roughly the same height and you can see par swings of 80 or more. The sides and front and back similarly can fall way off.
At 3" off the water, you've probably got even more dramatic hot and dead spots. May well be sweet spots for various corals.... just that the human eye can't see it.
You've got a couple of issues going on. I'm only an "expert" at spamming the like button and welcoming new members ;Bucktooth
Here -
https://www.reef2reef.com/forums/new-to-saltwater-reef-aquariums-post-here.130/or here
https://www.reef2reef.com/forums/general-lps-discussion.44/
for your hammer coral issues. Grab some close up pics of it as well.
https://www.reef2reef.com/forums/aquarium-lighting-by-dana-riddle.956/is all you could ever want to know about lighting. I'd search your lighting model in the search feature as well. Every discussion has been had at least 11 times before. Good chance someone has run the same lights.
