Maximas Prefer the rocks, but it seems impossible to get them to stick. I keep mine in the sand, and they do great. They normally just attach directly to the bottom glass(shallow sand bed).
Calcium calcium calcium. I know robb said it earlier, but I thought it was important enough to say twice.
Lighting is important as well. I've never tried clams with t5s, but I assume that they would be happiest close to the top.
Edit: Maximas Prefer the rocks, but it seems impossible to get them to stick. I keep mine in the sand, and they do great. They normally just attach directly to the bottom glass(shallow sand bed).
Calcium calcium calcium. I know robb said it earlier, but I thought it was important enough to say twice.
Lighting is important as well. I've never tried clams with t5s, but I assume that they would be happiest close to the top.