Originally Posted by
Filip
Hi Top dog and welcome to discus .
How long do you have them and how did you cycle your filter prior their arival ?
Do you have any other fish in the tank before you got your discus ?
Point is , maybe they got some minor cross contamination from your prior plants or fish in the tank , hence the darkening or maybe your filter is not fully cycled so you have traces of No2 and NH3 as irritants in the water , hence the darting and flashing .
I would stop randomly throwing meds at this point , and I would most certainly stop adding any new fish or plants from other tanks because it can further complicate your original issue .
As long as they eat and swim , as you said , you are still on the safe side and you should just give your best with aged water WCs and keeping the filter and tank maintenance on top .
Good luck Top dog , and please post us some photos of your monster tank and your discus .