Just last week my m8 had a puffer which he had for a few days and it was on the tank floor cos it was a brakish one. He didnt give a dam and said let it die. I didnt have another tank but i thought i could make the right water conditions for it inside the hex which would be heated by the big tank. But the poor thing died the next day when i went to pick it up
But yeah this is a great way of having two types of fish in one tank
DG it was a really smart thing to do, by putting another tank in a tank (now i got myself confused, lol ) for ur frys, and r u gonna buy any puffers to put in there?
I've got aother small fry tank which i could have put the fry in. The puffer would have been temprary cos if he had pulled through the i would have setup a new tank for some puffers