Firstly I would like to say thanks to MFK member msjinkzd for giving my advice on keeping yellow apple snails with bichirs. Also to all of you who posted in my other thread. 
Finally my LFS got a shipment of those little guys and sold them at $1 each. I got 4 of them, decent size not to become fish food.
They open up after 5 mins. My 3 little bichirs are circling it and occasionally poking them with their nostrils. I bet they are curious at their new tankmates.
After realising that they are not as good as hikari sinking pellets, the bichirs started to ignore them (good news). Here are the pics of the snails.
Do they eat Hikari sinking pellets too?

Finally my LFS got a shipment of those little guys and sold them at $1 each. I got 4 of them, decent size not to become fish food.
They open up after 5 mins. My 3 little bichirs are circling it and occasionally poking them with their nostrils. I bet they are curious at their new tankmates.
After realising that they are not as good as hikari sinking pellets, the bichirs started to ignore them (good news). Here are the pics of the snails.
Do they eat Hikari sinking pellets too?