ok, i finally found an alternative to southdown play sand. i went to my local home depot and they carry "best premium" play sand by garick. it is a silica based sand and the lady i spoke to at garick (very helpful) stated that may people use it in their aquariums. my question is since it is made of silica what can i use as a ph
buffer that i wont getting since my sand is not aragonite or calcium based? what can i expect from my aquaium by using silica based sand? i heard about possible diatoms but i know that is still a debate.
thanks for your help