Hi Anna and Carlos,
Anna, the fake plants are all new and there are only 4 in total all shown in the picture above. I have the two frogs which are not well in separate tanks while the other 3 which are fine still in the enclosure. But a honey bath? Could you explain a little more? I've also heard of putting brown gum leaves in the water dish as the leaves help heal a frogs skin. So I might give that a go considering they are Australian frogs and the gum leaves are found where they are normally found.

Carlos, the new frogs were quarantined for 2 months and were put into the tank with the other two after moving. The frogs range from 10cm until about 15cm, smallest one being 10cm and biggest being 15cm, the tank is roughly (h) 600mm x (w) 600mm x (d) 450mm.
The new place isn't near any chemical factories or pollution sources, I am not aware of any chemicals or insecticides in the household prior to moving, BUT we did get termites sprayed within and out side the house. What they have started much before the move and before the termite control.......
I use tap water before and after handling my frogs, but i have done so for four years, the tap water at my place isn't full of chlorine, frogs water dish is water which has been from the tap, boiled and let sit for a few hours to cool completely or tap water, but again, I have done so for four years.

Thanks for the help