I am looking to get my hands on some white play sand this summer for a new tank that I will setting up. My questions are these......Does anyone have a recommendation for white play sand that I can get from hardware store? Reason being, I am on a budget here and need about 100lbs of it so I don't want to be spending $25 a bag for 4-5 bags. I am not into spending good money on sand or rocks just because it says "Aquarium" on it. Honestly, my rocks all came from the beach, and were boiled same as my driftwood. My sand like I mentioned comes from Home Depot. It's currently Quikrete Play sand.
I idealy I would like two 50lb bags like I get of the tan play sand.
Next question, I did come across some white play sand at Home Depot, it was called "KolorScape" (Apparently it used to be called Durascape) and said right on the bag "NOT FOR USE IN AQUARIUMS".....Hmmm I wonder why? What is actually in this sand? Anyone used it in a Freshawater tank? I know of a few that have used it saltwater with no problems, but it's freshwater I am concerned with.
It does not seem to state what is acutally in this sand. I want Silica! I know that sounds crazy.....Silica produces Diatoms and grows algae like crazy. I don't care I want that to happen. It will provide some extra munching for my Hillstreams.
So has anyone used White Play sand? Where did you get it? How big are the bags and how fine is the grain?
Thank in advance for any info you may have.

Oh and sorry for my typos....I can't type.