Really? I didn't think about that. I did rinse it really well and I'm sure the lime was in powder form as the granules that are left appear to be pure silica.
I have pool filter sand (silica sand, same stuff) in my African cichlid tank and everything is fine there. However, I don't recall the bag saying that it contained lime and SW fish are generally more delicate than cichlids.
Anyone else care to comment? Thanks