If you're in cb70 and he's 950g I'd say you're 100% ok my Killerblast is 267g and in cb70 3 more around the same size will be here Tuesday and also in a cb70 rack. Kick your thermostat down to 90 (works flawless for me with aspen in those tubs) hottest spot they touch comes to about 90.7 gradient to 77 on the cool side with the ambient about 81.
My setup is 1 hide and a water dish, power eaters minus my male normal who's a typical eat 9-12x's a year kinda guy.
Balls aren't as fragile as people make them out to be. They can handle some variation.
As far as feeding he could be like my boy and just not a big power eater like my other male and female. I'd say offer him a live appropriate sized mouse if you can't get a rat then if he doesn't take it wait 2-3 days and try again.


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