I did a Alum treatment on my 1/4 surface acre (2 acre ft) Koi pond 2 months ago. The water visibility went from 8" to about 30". The results were great. It went from a muddy brown to a blue green color and I can actually see the Koi now.
There are Bass and bluegill in the pond but we dont fish this pond. I would love for this water to be crystal clear.
Alum dosage rate was 400lbs total over 2 days (200lbs one day then 200lbs the next)
My question for all you is are there any down sides to another treatment for a Koi pond? Is there more of a risk of a PH crash if the water is already relatively clear?
The first pic is from during the first alum treatment. The second two are from after 400lbs of alum
