I looked for South Down or any other aragonite sand in South Florida and could not find it. So I decided to compare other play sands and decided on a white, small grain sand from Toys R US. I cleared my old cc and added 125# of this sand and 25# live sand on top. I did this about 4 mos ago and there is quite a lot of live prospering in my DSB. I completed the entire project over a period of two weeks and never took any of my fish out of the tank. I had no casualties. The sand I used is silica but is working very well.
120 Gal FOWLR
1 Yellow tang
1 Blue tang
1 Sailfin tang
3 chromis
1 cleaner wrass
1 tomato clown
1 sleeper gobie
1 scooter blenny
1 bicolor blenny
1 coral banded shrimp
emerald crabs, snails, blue and scarlet leg hermits
Wet/Dry filter w bioballs
5+” DSB
Ammonia 0, Nitrites 0, Nitrates undetectable,
PH 8.2, Salinity 1.024