I’d get it out of the 10 sooner rather than later, but it isn’t going to kill it by leaving it in until 3-4 inches. Use your judgement, if it looks like he wants more space, give it to him.
I’d worry about the convict more than the puffer...these guys are dangerous.
Slow down on the bloodworms, fish get addicted, and he won’t want anything else (may want to separate the mollies during that time period). When he realizes there is nothing to eat but the snails, he will. I’ve found that my Amazon puffers (really picky) like mysis shrimp a lot. Much more nutritious than brine or bloodworms. As he ages, he will probably want mostly large crustaceans like shrimps and crayfish.
I’d worry about the convict more than the puffer...these guys are dangerous.
Slow down on the bloodworms, fish get addicted, and he won’t want anything else (may want to separate the mollies during that time period). When he realizes there is nothing to eat but the snails, he will. I’ve found that my Amazon puffers (really picky) like mysis shrimp a lot. Much more nutritious than brine or bloodworms. As he ages, he will probably want mostly large crustaceans like shrimps and crayfish.