I recently bought an Alocasia 'Polly' and put in my terrarium. Its been about a week since and the leaves are starting to turn a pale yellow and fall off. Its under a low light and the soil is always evenly moist.The humidity in the tank is always around 30 to 40%. Is it getting to much or to little light and/or to much or to little water.

p.s

All of the other plants in the tank are thriving.