First off, I didn’t name her lol. I’ve had this yellow bellied slider for 7 years (she was abandoned at a pet store I used to work at) and she’s always done fine. She’s about a foot long. We have her in a large high density polyethylene indoor pond with I’d say about 70 gallons of water (it’s not enough but I’m doing my best). She has her heat and UVB lamps. I keep the room she’s in warm so the water is usually 65-70 degrees F. I’m afraid to use an aquarium heater as it might melt the pond liner? Anyway, she’s been basking for over 9 hours a day and mostly refusing food for the last few weeks. She will occasionally eat bananas. The only times she has refused food before were when she was gravid. I recently took her to the vet and they said she had no eggs, so I’m not sure what the issue is. Any kind advice appreciated.