Used it in my 40g; tank, no rinse & no problems. I did have about a table spoon of flooding material.
Very uniform, very dark, actually too dark with the crypts I have so I syphoned it all out and used Sakrete all purpose sand $4.99 for 40#s. Much better, sm. gravel/sand mix. looks much more realistic than PFS or BlackDuamond.
Last edited by DogFish; 06-28-2012 at 11:57 AM.