It does sound like they are declining, in addition they look dangerously thin. Keep trying to feed, especially if the female is eating.
If they are still at 1.018SG, no medication in the water, then frankly treatment has not begun, merely isolation.
If they had brook, they would likely be dead, so that is unlikely.
If they had amyloo, I would expect them to behave differently at this stage.
I would expect a FW dip to be more stress then help.
I would expect a Formalin dip to be more stress then help.
Personally, I would be dropping the SG, feeding, and siphoning food.
fwiw: if they keep eating, there is much hope, but they appear extremely thin. Coupled with gill parasites, there is alot of work ahead.
If they are still at 1.018SG, no medication in the water, then frankly treatment has not begun, merely isolation.
If they had brook, they would likely be dead, so that is unlikely.
If they had amyloo, I would expect them to behave differently at this stage.
I would expect a FW dip to be more stress then help.
I would expect a Formalin dip to be more stress then help.
Personally, I would be dropping the SG, feeding, and siphoning food.
fwiw: if they keep eating, there is much hope, but they appear extremely thin. Coupled with gill parasites, there is alot of work ahead.