Treyco
New member
With the aragonite, my personal choice would be .5mm to 1.5mm size.
As for skimmers, I can't help you out because I've always built my own.
http://www.angelfire.com/ab/rayjay/skimmer.html
Lol ur reply came just in time cuz I was at petsmart lookin at sand an didn't kno which one to get..almost got the crushed coral but was gon get on an ask but seen ur reply..so I got a bag but I think ima need another but after I rinse it ima put it in the tank to see how deep it'll be an position the rocks like I want