I put it in my 90 gal tank. Bought it because I liked the size of the grains of sand. I knew that it couldn't really be alive as it sat in a bag in my house for 2 months and who knows how long in the store. I didn't rinse it, just in case it was "live" and what a mistake. Took days to clear the tank and now everytime I disturbe the sand I have another cloud.
If I had to do over, I would still buy it because I like the size of the grains of sand and all the other bits, but I would definately rinse it and not worry about the "live" aspect of it.
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