Join Date: Jun 2010
Location: Jakarta, Indonesia
That last picture shows signs of ick/white spots.
If you have a spare tank, move them and treat the original tank. In this case, smaller is better, specially for you, because you need to do more/massive water changes. Change as much water as possible daily. Have you tried adding salt? I often add salt to the medication if they show little to no recovery.
I'm assuming you're using tap water. If it only contains chlorine, you don't need to use dechlors. Age the new water for at least 24 hours with an airpump (longer = better). That way you know nothing gets neutralized by the water conditioner.