12-08-2011, 04:05 AM
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Any kind of aquarium sand should be fine since it was made for the purpose of being used in aquariums.
I went to my local Ace Hardware and picked up a 50 pound bag of playsand for $4.99. This would be my recommendation if you are on a budget. If you do end up going with the playsand, make sure you rinse it many many many many times before putting it in the tank. Since it is meant for sandboxes for little kids, it obviously would not have any additives or toxins in it. I just took a gallon bowl and filled it with sand, ran water over the top, ran my hands through it, dumped out the murky water, and repeated until it would no longer produce murky water after stirring. Each bucket took a good 20-30 minutes. The end result is well worth it! My Corys love the sand and it makes the tank look better than gravel IMO.
Post some pics with your final result! :)