Murky Pond Water

Question:
Why is my koi pond water grey?
I checked my pond ph and it was around 8-8.5.
I did a partial water change and now the pond water is a grey/smoky blue color.
2 fish died.
I'm assuming it was a sudden ph crash, but does adding a little tap water change the ph that much?
What do i do?
Are there chemicals i can add to balance the ph?


Answer:
Sounds like you needed to add dechlorinator when you added the tap water. The chlorine in tap water can kill fish as can any rapid change in water temperature.
I doubt it was a pH crash that killed the fish.
You can add vinegar to lower the pH. You can also use muriatic acid, but you really need to be careful with that. pH down is a swimming pool product that will lower pH as well. I use vinegar.
he murkiness is probably because of stirring up of the water. See if it settles down after a few days. But put dechlor in there now or you will lose more fish.