skippy2,
Thanks. Yes, I scrape the back glass but leave the coraline on the overflows. I use a combination of snails but I think the Nassarius snails do the best on the sand. I have Margarita's, Trochus,Cerith, and Nerite's also.
The light is a 72" Maristar running 3- 250w 14K Phoenix DE bulbs with
4 39w T5 atinics.