do not use chemical additives to change your pH - -you making it go up and down is far worse for the frogs than a stable one!

They shed very quickly and usually eat it right after. An ill frog sheds more often and often in tattered pieces, which you see like a filmy hanging thing at your water surface.

Also, stop feeding freeze dried bloodworms. Stick to the frog pellets and frozen bloodworms.

Your frogs are probably ill from being in a bad environment which is what would lead to being lethargic, loss of appetite, and tattered shedding.

Hopefully they will recover, but it depends on just how ill they have become.

Close up pictures of the frogs would be very helpful.