CPD's are also at some fish stores by their proper name, or any of the other names above, so as you call independently owned local fish stores, you might want to mention all the names if at first they don't know what you are looking for. Celestichthys margaritatus
All this previously said, they are listed to go into a 10G tank.
I have my present ones in a 12G Edge tank. They barely use 1/3rd of the lower part of the tank, so I personally wouldn't be opposed to trying them in a 5. Make sure there are many leaves, stems and places for them to swim in and out of.
here they are with a Green Neon in the above tank.
They are expensive. They are easy to find online, but shipping could make them even more expensive than picking up 6 at the lfs.
All this previously said, they are listed to go into a 10G tank.
I have my present ones in a 12G Edge tank. They barely use 1/3rd of the lower part of the tank, so I personally wouldn't be opposed to trying them in a 5. Make sure there are many leaves, stems and places for them to swim in and out of.
here they are with a Green Neon in the above tank.
They are expensive. They are easy to find online, but shipping could make them even more expensive than picking up 6 at the lfs.