Thank you very much!
No, frog lives in the living room, so I will stop the light unless we are gone & the house will be quite cold this winter. And he does get nice afternoon sunshine daily on the one end of his plastic tub.
A couple of times he has flown round the box with a thud, when the curtain fell down on his box. But mostly he just jumps into his leafy vine (philodendron in jar of water) or into his water section. he really is calm (I think) for a "pet" that you can't really soothe with talking or petting.
We will discontinue the fish - they were actually purchased for the garter snake (that escaped), then he ate them so I got some more. Thanks for the heads up - I never thought about parasites. Do frogs need to be "dewormed" periodically like dogs? Do they need vitamins or some such thing?