Caiman lizard only ate once since adoption.

[WavySway]

Hey all I’m a first time caiman lizard owner and I’m very concerned on whether or not I’m housing him correctly or the husbandry is off. I have him set up in a 65 gallon aquarium mostly water, internal filter and 50 watt heater on top of the filter, basking logs and branches, 100 watt heat lamp and 23watt 10.0 uvb bulb, has a screen top with half covered with a towel but no underwater substrate (I.e: river stones, pebbles, etc.) I’m not really sure how to get him to eat but it’s been about 1 -1/2 weeks to 2 weeks without another meal. Last thing he ate was tilapia cut up into small rectangles that I had to hand feed him. Ever since then I’ve had no luck. Any and all advice is appreciated, I’d rather not have this lizard specifically passing away on me since it’s been a dream reptile for about five years until I was able to finally adopt 1.

 

[WavySway]

This is usually where he spends most of his day/night, below the basking and UVB bulbs.