Thanks for the help. We are working to get the green water safer. It was clear but brown first and then went to green.

We use the quick test strips and try to keep everything in a close zone. We have slightly acidic water so that is a constant. We will be putting up an arbor for cover. Part of the pond is under an eave of the house, but there is a couple feet that only get shade in the morning and evening. Is there a dangerous temperature high for KOI? What is the best way to keep track of ph,alkalinity,ammonia, etc? Are the strips good enough or should we go liquid? Do we need a salt meter?