I've got a 48"aqua lunar on my 75gal and i've got two clams one up high and one in the sand bed both are doing fine the only thing that I can't handle is acros. Although i do have an incrusting that appeared on one of my rocks that is doing fine when its not getting stung. I do not have a increadible growth rate though, quite slow but doing well.
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Jared 
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