Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
I am surprised that any pool filter sand would do this.
However, you have one that does. :-(
I would do the best you can to remove it from the tank. A very small trace may remain, and that little bit might be OK, but I would remove all visible bits, even if you are wasting some of the Flourite.
There is a slightly different material.
It is sold as a base for the Cool Deck or Desert Frontier Pool deck surface by Stegmeir.
The sand is a ground dolomite called Deck Sand.
I tested a tablespoon in a cup of water, and it sure sent the readings skyward!
Dolomite is a shiny, sparkly white material. I am almost positive dolomite is calcium carbonate and magnesium carbonate. I get this at a masonry store. They sell rock, concrete supplies and similar materials.
The local swimming pool stores sell 20 and 30 mesh sand for pool filters, and it has always been a silica based sand. I can get other sizes of silica sand at masonry stores, too. One of the brand names is Lapis Lustre.