Thanks guys
I already have a tank with coral rock in it & the demasoni's are happy breading.
My tap water ph is around 7 & the rock raises it & holds it around 8.
I have steam cleaned some limestone & have it soaking in a bucket so i can test the water after awhile, will def try the vinigar test thanks.
Im just wanting a bigger tank & didnt want to spend huge money on getting more coral rock. I would like to go 1800w x 600h x 600d with a sump 600w x 450h x 550d (funds permiting!) will prob put the coral rock i have in the sump & just use the limestone to aquascape (if it has no contaminates on it). Anyone know of someone who can build tanks like that, or someone selling one?