Make sure the uth is regulated , and that you can set the temperature on the thermostat. This is very important! Brazilian boas are mainly arboreal species so try to get vines for him to climb on. Look into a "versa top" for your enclosure it will solve the lower temps along with the thermostat. "Versa tops" are dual glass folding panes that come with a plastic attachment that slides onto the glass edge and covers the enclosure. You can put holes in the plastic to facilitate air flow. I think you just need to tweak the husbandry and you should be good.