Ideas on tank enrichment items

[Serpentine_Queen]

I've used aquarium silicone sealant too, & used it to glue a cork into a larger hole, for example. If the hole is in driftwood, you can also glue a bit of wood in the hole to match.

I've used 100% silicone (like for aquariums) or hot glue. Either a bead/blob of it to block small holes, or I'll seal a rock in blocking bigger holes. Give it a day or two to cure before you put it back in the tank.

I bought 100% silicone for my aquarium last week! I didn't know what it could be used for... could you paint on it or would that create toxic fumes?