The datnoid is originally from Mike. The FRT has been good for 2 years now with rays. The day i see a chunk missing she goes. As for the sand...the stuff i used never settled well. with the rays the tank was always cloudy. I just got home and for the first time the tank looks crystal clear. And yeah in the future I have something between 450-600 gallons in the works. Wont be till I close on my house though