Oh yeah, he'll be fine for that long, unless you pour growth hormone in there!
I see glass catfish, an angelfish or possibly two, and some smears that look like maybe some kind of barb... What all do you have in there?
My adventures in keeping Indostomus crocodilus, the crocodile toothpick fish. AKA armored stickleback, paradox fish, and freshwater pipefish. Care is (to the best of my knowledge) exactly the same as Indostomus paradoxus.