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[Aquattro]

Tony, it is a 155g with 2 x400W 10k and 2 x 110 VHO actinic ona WH7.

I've had that cap in different locations, from right under the light to over on the side. I wouldn't worry about the base, as corals tend to do that as they get larger. I actually have a shroom and some GSP living in the base. Do you have one light or two? Looking at mine, it does get some light on the left side.
Current isn't what it could be over that one because I have a hammer just below it that doesn't like current. Every couple of days I blow debris out of the cap with a baster. Works OK until I find a home for the hammer.
I even have a frag of it laying on the sand and it grows well there too.