Did a quick stop by Meadows Hot Springs earlier this week. Other than the hot springs diving novelty, I didn't find the dives interesting. The main pool was hot at 37 C (99 F) and only went down to 7.4 m (24 ft). One can last about 20 minutes in this temperature but not much more. The cavern area is tiny (about the size of Devil's Eye at Ginnie Springs). In fact, probably does not qualify to be called a cavern since the overhead is just a few minor overhangs sticking out about 1-1.5m (2-5 ft) from the walls. Since there was nothing else to do (takes 2-3 minutes to see everything), I spent the rest of the short dive collecting all the junk that rednecks had discarded in the pool (light sticks, light bracelets, bottles, cans, etc). I brought out a noticeable pile of trash. I wonder how long it will take for people to get new trash in the spring.
Pool 3 was perfect temperature at 29 C (84 F) and one could stay in it indefinitely. Unfortunately, it only goes down 3.5 m (12 ft) with nothing of interest. There is a small crack that one can't get into which has collected some trash. If I had a stick, I would probably try to get it out, but I didn't.
Didn't even try diving in Pool 2 since it looked very shallow and the water visibility was low due to algae bloom. It did have some fish in it however. Pools 1 and 3 were very crystal clear in comparison but I didn't see any fish in them - only a few algae outcrops in the shallows and some light algae/sediments on the bottom which reduce visibility when disturbed.
Hope this information is helpful for anyone else who would like to visit these springs.