i have a plastic ornament in my tank shaped as roots/driftwood (only fake piece i have and starting to hate it). its hollowed out for weight i guess and my clown loaches hide in there all the time. id like to seal off the holes w/ a type of sealant wence they all come out (which never seems to happen lol). so my question is 1) how do i get the loaches out lol and 2) can i use the sealant you would use on the tank or is there something else better.