I just pulled your picture up on a bigger (better) screen and agree, the color looks greenish/yellow. Ammonia needs to be zero. I think Mitch mentioned what to do regarding this so I won't repeat. I still think you have too many fish for that size pond regardless of the cycling issue.It may be me but looks like your ammonia level is starting to go back up again.
Never tested for Nitrite.Those tests look great but let's find out about dissolved oxygen. The chart shows a check mark for nitrite. Is that a recent test?
I really got carried away.In any event, I think there are too many fish.
I'm probably going to take some heat for this answer but suggest about a maximum of four goldfish in a well-filtered, 650 gallon pond. I always error on the side of caution and consider what is most humane for the fish. Given the pond is still cycling, I recommend finding another home for most of them. In my opinion, nature will reduce the population if you don't and the fish will suffer. I can't tell how big all of your fish are except from one image, two of them look like they might be about 5-inches long, There are so many factors (and opinions) in determining the best number of fish but here are just a few: surface area, temperature, filtration, size of the fish (very important), how much they are fed and reproduction etc. And, it depends on the level of effort you are willing to make. Really, I think four goldfish will be very happy in your pond and you won't have a high maintenance situation. Besides, ponds are supposed to be pleasure not drudgery .How many should i keep??
Really, I think four goldfish will be very happy in your pond and you won't have a high maintenance situation.
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