This may not be inline with professional recommendations, but when I purchased my frogspawn I put it near the bottom of my tank for about a week. It looked fine. Then I moved it up where I wanted it (near the top of my tank). I am hoping that my clowns, who hang out near the top of the tank, will use it as a host. Frogspawn is going great in that position. I've had it there for more than a month now.