"Some of them shed badly no matter how high or low the humidity is though."
I have only kept two brongersmai, purchased as started hatchlings and raised up and bred once (I wanted to experience maternal incubation, which is really cool), but I agree that troubleshooting their shedding issues can be a wild goose chase. Giving mine periodic soaks (every week or two) seemed to help. I recall running RH closer to 80%.
I only had one health problem with one of mine, which got mouth rot out of nowhere once, and it cleared up fine with a vet visit and antibiotics -- so, make sure your vet is good with bigger snakes. They seemed pretty tolerant of reasonable environmental parameters, though good equipment is a must (PVC enclosure, RHP, quality thermostat) -- they seem unlikely to deal with a fish tank with a heat mat.
Neat species, but can be a handful even when they're well behaved -- which mine always were, like puppy dogs. They're just a lot of snake. The hatchlings I produced were pretty miserable, though (just really defensive).
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