Safe Tank Adhesives?

[Big_eyes]

Are there any?

I was thinking about making a coconut cave but don't want the coconut to be obvious. Is there something I can use to glue/stick some substrate to it to camouflage it a bit better?

 

[onebto]

There is of course aquarium safe silicon mastic for one

 

[Big_eyes]

*Put's hand to face

Doh! Should really have thought about that one eh. lol