I personally have raised three rainbows, two Brazilian one Columbian. And yes I’m a big fan of letting things drop to the low 70’s. But if you already knew better, then what’s up with confusion about it’s digestion? People are just trying to help and you, and you stated it’s not “digesting properly”. So the first thing most would look at is husbandry. That’s why the answers you received regarding “slow” digestion, were given. We assume your husbandry is probably off, that’s all. And that Reptile magazine was not only awesome, it probably did more for the hobby then most people could ever imagine.