Need advice in hurry. i have 24 gal Innovative Marine tank with very fine sand bed. Pair of Phantom decided to kicking sand round irritating the corals, some closed up for days now. Just got some live course sand from the scr member, he just took down the tank ( shout out to Patrickf giving it to me for free along with some other freebies, thanks again ). want to know what to do with it? remove all the old sand and put new one in/ or just lay the new sand on top of the old one/ or clean/dry out the new sand then make new layer. Your thought and advice greatly appreciated. Tia.