Bloodworm can't bloat fish up if you over feed them. Only feed twice a week and only a few.
Cook some frozen peas for a few minutes, let cool down and pop out of shell. Mush into small peices and add to the tank.
Must pop out of shell as fish can't digest the shell.
Also introduce some brime strimp and daphnia into there diet.
Daphnia good as it helps the fish digest its food.
Are the bloodworms frozen, live or freeze dried.
You can buy frozen food packs with four different foods in them, like brime strimp, daphnia, blood worms, micro worms,
He's that bloated its lifting his tail of the substrate.