Today I bought some Carib-Sea sand from the LFS
. I paid $22 for a 15lbs bag (ouch).
The reaction of the K
-Mart brand sand and the Carib-Sea was 100% the same.
I used equal amounts of each sand in equal sized cups and added equal amounts of vinegar. After the fiz stopped I added more vinegar and it fizzed more although not as much as the first time. I added vinegar a third time and they each fizzed the same agin.
I am now comfortable that the Sand I have is going to work in my tank.
55 Gal FOWLR
105 lbs Live rock from LR
2 Yellow Tail Damsels
2 Green Chromis
1 Emerald Crab
3 Peppermint Shrimp
4 Scarlet Hermit Crabs
1 Blue Knuckle Hermit Crab
1 Large Turbo Snail
Hitchhickers: 3 Purple sea urchins, lots of rock crabs, pistol shrimp, brittle stars, snails, worms, etc.
and aiptasia, aiptasia, aiptasia (it was free $$)