How do you get a mushroom to stick to a rock. I have one that prefers to be on the gravel at the bottom of my tank. I keep placing it back on to a rock and before long its back on the gravel at the bottom.

Glue or tie with cotton.

I'd think that nylon netting stuff you can sometimes find fruit in at the super market would be good?

it doesn't matter to much what you use as long as you hold it in place for a week or two. I have often just jammed them down between rocks, they will grow out into the light.

I found that cotton and netting was a pain cause the cotton either comes loose or cuts the shroom and netting tends to cut and is a real pain to remove later

a tooth pick, with a little aqua need-it to stick it to a rock.

let it stick to some sand and then super glue it to a rock, always works.