the tank is 30-32 deep I forget the exact but they don't kick up sand really. If positioned right at the sand they will carve a valley but angled across my rocks and glass is working well. I have oolite sand and besides when I use a spare maxi to blow my rocks and kick up crap I don't have an issue with sand in the water column. I was having a lot of trouble with 3/4 thick glass the koralias weren't strong enough to stick to the glass so they were on the overflow boxes above the corals and that wasn't visually pleasant or nice for the corals. The euro bracing is working amazingly for power head placement and they are easily accessed or tweaked when needed.
Ben
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Poor guy will never get out of the box
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