Randy Holmes-Farley
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@Randy Holmes-Farley
That number was in some articles by Caribsea many moons ago. Having used a 6” dsb for 25 years with a Jaubert Plenum, I can document loss of substrate into bulk water.
Considering that pH in depths of dsb is different than in bulk water, I say aragonite sandbed can buffer a reef tank. Perhaps not SPS dominate.
I think they are wrong.
Sand beds can dissolve even if the water above is high in pH because the degrading organics in the sand will lower pH