I had fine Caribbean sand but had an hair algea and red slime algae problem after my cycle. It was recommended by my lfs
to remove the substrate and let the algae die off. It worked and I put the sand back after awhile. No algea came back. But my snail and invert waste was visible and ugly with no substrate. I am now having the same problem since I upgraded to a 40g breeder. But I refuse to remove my sand. I have bought many hermits and more snails along with a sand sifting starfish for a clean up crew. It is now controlling the growth once I get my sump/refuge up and running I believe my problem will go away.