The verdict.
I finished adding this CaribSea Reef Grade sand. I added about 60lbs to my standard 120G (48X24X24). I have 2 Tunze 6080's pointed add each other. Return pump is is not a factor compared to the Tunzes.
Too be expected there were some small sand tornados and some very minor sand movements. Overall I must say the sand did stay put. Infact it didn't move at all after the first 2-3 minutes. I have no bare spots. I'd highly recommeded.
Thanks for everyones input.
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