A pH of 8.4 is pretty high for most freshwater fishes. It would be fine for Rift Lake cichlids
At this stage, just see how the pH in the tank goes. If it is still above 7.6 in a couple of days, then make up some water with the pH reducer and do a water change with that water.
Try not to change the pH by more than 0.1 or 0.2 every few days. Sudden changes in pH can kill the fish.
At this stage, just see how the pH in the tank goes. If it is still above 7.6 in a couple of days, then make up some water with the pH reducer and do a water change with that water.
Try not to change the pH by more than 0.1 or 0.2 every few days. Sudden changes in pH can kill the fish.