For those that have the 3M sand in your tank, how long have you had it? I just received mine today and was reading the "ingredients" listed on the bag. Wondering if anything would leach out of the sand.
I bought the brown colored S grade. Put some in a small container and rinsed, it looks really good.
I bought the brown colored S grade. Put some in a small container and rinsed, it looks really good.
