Originally Posted by carey
I've used pool sand twice and havent had any issues with ph. It's all a matter of the live rock and doing water changes.
No doubt that is true ~ but I never said it would cause issues with pH, I said that arogonite would help with pH issues. Not everyone is faithful with water changes and when we get a little lazy, which we all do, having that llittle extra buffering agent can make a difference.
Truth of the matter is, I know individuals who have used play sand successfully and even one fellow who took sand from a local lake (that tank is still up and continuing to run successfully by the way). Anything can be done if one wants to work at it hard enough. I simply pointed out that the arogonite is better for the tank in the long run.