Hello thank you all for your responses.

I am unsure of how to PM in this forum >.<

We are located in upper Manhattan. Originally we were told he could go three months without being fed, but we upped it to once a month. He seemed to be okay with that schedule because he would make himself seen exactly every 4 weeks. When we turn the heat lamp on, he lays directly under it. The type of fish that we feed it are usually the tiny feeder fish found at Petland. What is usually the cause of this deficiency and how are we able to help him out?

Also if you could let me know how to PM on this forum. Thank you very much!