Showed up on sand bed

[RandU]

is this a toadstool that popped up on my sand bed? Thanks. If so can I just glue it to a plug? Thanks

 

[Xanthurum]

Looks like it could be, do you have a toadstool in the tank that it could have come from? If it is a toadstool it’s difficult to glue them but pretty easy to wedge it in a crack or small hole where it can attach on its own.

 

[Grelby]

If it is, tie it down lightly on a good rock.

 

[RandU]

Rubber band it? Or set it on rubble? I do have two toadstools but I just put both of them in less than two weeks ago