Eco carpet maybe once a month. I sectioned off the standard 20 gallon long size into three equal sections. Everytime I'd out new moss down I'd pop out the old carpet, get as much moss off as I could, spray it with the suggested cleaning spray (Wipe out? It's on the package of the eco-carpet) and let it sit to dry. After it was dried off I'd rinse it off in tap water, wring it out, and then rinsed it again in dechlorinated water, and wring it out again.
The new eco-carpet I'm using for the 40 gallon wasn't as good of a fit, but I found out she prefers to have access to the gravel as well and burrow into it. Well more make a frog sized depression, but she thinks she's being sneaky
For lighting she was under a daylight heat bulb and tropical uva (it came with the combo mini dome light kit I got when she just finished morphing from a tadpole, she seemed to do fine and I figured this kit was more appropriate than the desert heating kits. IIRC I since replaced the blue daylight with a basking bulb (had a freebee from a friend. She seems to prefer that.
The other side is a standard aquarium light for plants