Advice for a Frag Tank

[toytech]

i have had a 15 gal frag tank up for over a year now and i would say add a sump , i wish i had . Rics and yumas are easy and theres good demand , zoas can be tempermental with growth. Dunnow about sps because my tank is crashing and all mine died (like i said wish i had a sump). I realy like the 1x1 inch marble tiles from home depot are great for frags and there realy cheap.