Recycling SPS?

[asylumdown]

I've noticed dead coral is the first place cyano and then other more tenacious algae starts. It seems like there's something within that matrix they can extract that they can't get as easily somewhere else.

Crushed and disbursed amongst your sand might not be as bad, but it would be pretty easy to spot test.

[Patwa]

Originally Posted by tang daddy

Some of the sand beaches are created from parrot fish grazing on sps corals and pooping over millenia.... Don't know how much of that is true but saw it on oasis lol.

indeed most beach sand is made this way......here is a school of bumphead parrotfish I photographed doing just that