Snails and crabs

[skull69]

Hello I got my cleaners the other day and I think I need help like 20 of my snails are clumped up on the bottom of my tank and like 15 or so are at the top left corner all in one clump :notsure: I hope they are ok. :help: :needhelp:

 

[joker_ca]

my snails and crabs mostly are active at night, check them out after the lights go off to see if they are moving around :yes: