Let the fish chill for a minute with the light off. Monitor if possible. Key now is to keep the fish calm and 100% stress free.
If the ph was at 6.6, and the fish that is having trouble came from a ph of 7.8.... In my opinion, that would be ph shock. But, let the fish chill for a couple minutes and then update us with the results.
If the ph was at 6.6, and the fish that is having trouble came from a ph of 7.8.... In my opinion, that would be ph shock. But, let the fish chill for a couple minutes and then update us with the results.