Bristlenose LOVE these ornaments.

[Tttay89]

Maybe a tip more than advice.
If you've got a bristlenose fish, they absolutly LOVE this type of ornament, I had quite a nocturnal one but after being in there only over a week spends a good 20 minutes a time rubbing himself inside of it rolling around . My other one also has a quick tickle every now and then. Unless it's absolutly riddled with algea already but to me it looks more like enjoyment than a meal

 

[Retired Viking]

Cool , sounds like your fish is really enjoying himself, must be like a good back scratch