Need some advice if possible - bought a tank (48L) kit, with heater, filter, lights etc etc. Then did everything we were told to do, setup with tap safe, left for 3 days - all good, temperature at 25 and stable
We then bought some harlequins (4 of them as that is what shop told us to start with) from the same shop
left in bag for 15 mins in tank etc, then gently introduced them to thier new home, kept light off for first night and didnt feed till morning (with recommended food), then today, 2 of them went a bit erratic, then lethargic, then died?? Their gills seemed to be going very fast and were swimming into things and at funny angles.
Now it seems like the other 2 are doing something similar now - any ideas?