sorry it took so long to respond. (school work..blah blah) 2" sandbed, coarse crushed coral, 75g aga, 1200gph running the main feed to the tank, top fathom 250 skimmer, just added carbon/phosphate sponge filtration, 55g sump...prolly about 25# LR..which is totally inadaquate for the size of the tank..i had 3 greem chromis, and a percula clown, but the clown got ate up by the pump..and 1 of the chromis died..he was shell shocked from my dads sump(way more pumps than mine) he never did do well in there....anyways back to the point...i pulled about 3# of seaweed out of the tank that day, stirred up the sandbed, and siphoned out all the crap(or what looked like crap)...and im happy to report now...NO MORE CYANO HERE..so now im just getting my water cycled once or twice before i go pickup a snowflake moray..