Hey could you take some pics of the shrooms
and polyps. I get the drsfostersmith catalog every month and I've been looking at the 7 mushroom pack and the 5 polyp pack.
For the mushrooms, what I do is put some rubble in a plastic container (like one of those small ones you get at a deli when you want a small portion of mac and cheese or coleslwa or something like that) and then i cover the container with this red plastic mesh stuff (i don't know what it's called but it was covering the top of a box of clementines so they didn't fall out). That works for me since I cut my mushrooms every now and then.
I have some button polyps and what I did was get a dry piece of lace rock, make sure it was clean, take the polyps and dry them off then super glue them to the rock. It worked very well.