Garden Pests and Diseases: Pachira aquatica , 3 by Planties4

Planties4 wrote:
Hello garden friends! I wasn't sure where to post this question:/ but let's see if y'all can help:.. I recently purchased a pachira aquatica and I read all the details to see how to grow it large and beautiful! However the leaves started to turn brown and yellow and to fall :( I have been only watering it once a week how people suggest and I have it in a corner where the Sun doesn't shine right on it but gets good lighting.. What am I doing nothing wrong?