I'm thinking of blending four types of sand and putting it in my gf's tank. I've got to get her input on it so one or two of those types will probably drop from the blend once I talk to her. I was just wondering if anyone had blended sand before and if you have any suggestions on ratios or types of sand to use. I'm thinking I'll do 30%all purpose 30% pool filter 15% play sand and the rest tahitian moon. I may cut back on the all purpose and the pool filter depending on how much the TMS sand costs and how much comes in a bag. I have play sand in my tank and she loves it but doesn't want it to be so bright and clean looking. I figure different types of sand and maybe some natural colored small gravel mixed in would give the effect she's looking for.