mag 12

Hi all, While i've been in aquaria for maybe 20 years I've recently downsized from a 150 FOWLR to a 90. It's been years since i've set a tank up but this one is 90 drilled with Sump with dual bags, Eshopps PSK200, Mag 12 down below. In the tank is a 2" live sand bed, about 40 lbs base rock...