Should I use dirt as substrate for my Reeves turtle's basking area?

Reptile carpet, paper towels, butcher paper or even slate can be used as a substrate in iguana enclosures. If you choose reptile carpet/turf, be sure there are no strings or loose ends which could snag a toe or limb.

This is not normal, as turtles are air breathers. Hiding under the substrate could be due to fear or if getting too cold. As stated prior, husbandry changes should be made in an attempt to provide better husbandry, a haul out site that is warm. Good luck.

As long as the bark pieces are large enough, the chosen substrate should be fine. Small bark pieces could be accidentally ingested though, so care must be taken when feeding. Other options include reptile carpet or a moss/soil mix.

That's terrific news! It is great to read of your frog's recovery. Most keepers will keep a bare bottom tank. This will prevent ingestion of substrate and makes finding food easier for the frogs. It also makes it easier to keep the tank clean. Sand would be fine. If they inadvertently ingest some, it should pass easily. If you decide on gravel or river rock, make sure it it large enough to prevent ingestion.

Thanks for reaching out about Michaelangelo. Depth of the water is not that important as long as there is a haul-out area, with radiant heat (and UVB). Ensure haul-out area is used and the turtles are able to access. (might need a ramp). The larger the water volume, the more stable the conditions. Good luck.

Don't worry, she'll bask when she needs to bask. As long as she is able to get on the platform, it is fine. You can dry dock her by taking her out of the tank and placing her in a separate container. After an hour or two, return her to the tank. The cover and the mesh top are fine.

An adult slider should have at least 10 gallons of water per inch of shell length. Bigger is always better though, so if budget and space allow then try for a 75 or even 90 gallon tank. Provide a UVB light source unblocked by glass, plexiglass or fine mesh. Heat sources (for the water and for basking out of the water) are also necessary. A basking platform out of the water should be provided. Use a filter that is rated for at least twice the volume of any tank you choose. This will help maintain water quality. You can read more about keeping sliders at the links below. http://www.anapsid.org/reslider.html http://www.reptilesmagazine.com/Red-Eared-Slider-Care-Sheet/