hi mate
i had the same prob with my ph on sunday had to do a part water change and added a bag of zeolite and hopefully its ok now .Your right about one thing max is a great help she advised me on my ph and wot to do .Being new to koi keeping myself its good to get advice of other members
from what im gathering my fish should have died long ago.... not sure about yours but 4 and 5 drops is a hell of a lot better than 1 and 2 matey..... ps.. congrats on the birth of your little one ,,,, ones lol....
