Hi Caspian, I'm very sorry your frogs are not doing well . Described symptoms appear a neurological issue. Could be triggered by an electrolyte imbalance, temperature shock, or even a contaminant in that garden moss. Since timely correcting problem is important; myself would go for all possible causes.

1. Remove moss and replace everything exposed to it. That means removing all substrate, decor, and replacing everything that can't be washed and rinsed.

2. Can you move the frogs to an area that is not exposed to outsides temperature swings? An automatic controller like Zoo Med HygroTherm Humidity and Temperature Controller can also help keep the temperature/humidity parameters more stable.

2. Use unflavored Pedialyte or a similar baby electrolyte to prepare a 1 part Pedialyte to 9 parts 80F dechlorinated water solution and give frogs a 20-30 minute bath in frog chin deep water. Can use a critter keeper or plastic bowl with a holed up top. Cover with towel to keep warm and reduce stress. Can do this before feeding frogs to help perk them up.

3. Please describe your enclosure water section and the water source/type. Test your water for presence of ammonia, nitrites, and nitrates. Also, check your dechlorinator is not expired and ensure you do not overdose it.

4. Check Ca and vitamin supplements are not expired and use according to these schedules, since overdosing can be as bad as under dosing: http://www.frogforum.net/food-feeder...schedules.html. If you can get Repashy's Calcium Plus locally, can use with every feeding with no issues.

Hope this helps and let us know results of water tests. Good luck !