hello im new to the forum. I have started making agrocrete and I love it so far Ive made 4 small batches experimenting. I am useing kolorscape play sand just for my molds. I was wondering if this is safe. most of it just rinses off of the rocks. but there is a little that gets stuck. Ive only made a few rocks so it would not be too much of a problem if I have to scrap them but I made a really cool cave I want to keep. Im just concerned about the sand since it's not the right stuff.
