my pico already has some live rock. the only other living thing is a baby maroon clown. So you reckon I can just put in my dead sand.
Sorry to hijack your thread @Qckslvr
it can work if it is air in the bag and he is exhaling through his nose similar to what one has to do to clear their dive mask. though if he was inhaling in from the bag, the bag will contract similar to a balloon, so I do not think he is inhaling from the bag.