What substrate should I get for my 130G if I'm using 2 HOB filters for filtration? I wanted sand since I have a fire eel. I remember something about pool filter sand and how it was heavier/better, but then they didn't carry it at OSH or Home Depot. Can someone give me a brand name or post pictures of a bag of sand that's good for aquarium use? I'm not going to get it at a LFS, because it would cost a lot to get it in smaller quantities. Any advice would help.
