lol, first came those little carbon do-hicky things u put on the end of ur updraft tube, then the power head revolution. arrrrr the good old day! when ELO where a big hit in the top 10 charts & michael ive almost run out of money jackson was still black!
ive got some fossile coral still active in my tank, snails used to clean them somewhat, the coraline, espec the pinks&purple look great on them, but good old trigger has made lite work of both in my tank now thats he's bord stiff &alone.
if i ever did want to clean them id scrub them with a clean tooth brush and leave them out in the sun for a couple of months, but i have a surplus on coral and its smaller brother rubble that i have plenty to put on a rotating cycle through the tanks, i dont though, too lazy these days!