Well it can be done, thouh it'll be a lot of hassle. With a kH that high you will, I fear, be wanting to mix in RO, (and I usually don't espouse fooling around with water parameters).
Are they still eating - then it's possible. If they're not eating, they're likely doomed. Discus of that size need to eat a lot - if they miss eating more than a couple of days they'll start to waste away, and you wil be really risking stunting them too. If they wate away very much, they end up just hanging around and dying. I've done this before with a single fish, and I found that the only thing it would eat for a long time was bloodworm which I soaked in a vitamin supplement
If they're eating, clean , warm water, good food and lots of tlc should be enough to turn at least some of them around. |