So I'm planning my 300gal. My current 135 is bare bottom and it's just so ugly... Will pool filter sand work for the substrate in an overflow/sump system? Anyone use it or heard complaints?
As Tom posted, PFS(pool filter sand) is extremely popular here on the forum. In case you're wondering, 2 bags will give you plenty of coverage for a 135gal and 4 for the 300gal. A 50lb bag is about $8 in my area.