40 breeder here with a green Mandarin and a red scooter Blenny. They are both fat and appear happy. I was able to get both to eat anything. I started them off with white worms and slowly mixed other things in and before I knew it they were eating everything. They are slow eaters so I squirt food right near them to make sure but it can be done if you put the time in. You can put in a smaller floating acclimation tank and try to train them to eat other foods. I believe once they get the taste of food other than pods they’re good to go. Heres my red scooter with a mouth full of fresh clams. She’s a pig! Like others have said though if you plan on just pods your tank is going to need to be established or they will wipe out whatever bottle you dump on fast.