The dose of AlK was approximately 7 times the reccommend for the tank size, almost 1ml per litre, you can only go so far. Years ago, I made a grave error in adding Alk, almost 5 times reccommended, in 12 hours, leathers laid down, all others shrunk, fish appeared to be stressed out, breathing was labored.....in a panic....I did 10, 10% water changes 2 hours apart.....in 12 hours all things returned to normal. While it may have not killed the fish, it would have stressed them out and would have to be corrected in the short term.
Some believe it was a diease that still remains, but the original fish are immune.
That is quite possible....I do not know....but wanted him to start by getting the water in line.
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