Are these test results ok?


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This website, link below, has a lot of information about fish waste and filters. The answer to your question is, it depends…. For 750 gal. With good filtration and fully cycled, I would say one koi or 20 goldfish, but that’s just a guess. I have had 10 happy adult goldfish in 300 gal. for five years. They are 6-8 “ long.

 
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Your should be cleaning the filters every week. And clean them until clear water runs out.

This could be your problem. Your filters need to be clean in order to do their job.

What type of fish?
 
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Thank you for answering my question.

From my understanding, goldfish in a pond need 50 gallons each. By that standard, you have enough water for 15 goldfish. Since yours are so small, you might be able to get away with having that many for now, especially if you can get your filtration running as it should. But at some point you will need a bigger pond for them.

It would be best if you could reduce the number now. Can you return some of them to where you got them?
 
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No one will take them. I will upgrade the filtration.
BTW: Should i run the filters in the winter Zone 8
 
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You should have more than enough filtration as it is. Clean them more frequently and see if that will get the water parameters in good shape. If not, you may need more or a different type to get the job done.

If the pipes and filters won't freeze where you are, I would keep them running all year.
 
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I clean the filters every 2 months. And the pond is 750 gal
I have backwashed my filter every 7 or 10 days for the last 13 years and that works out pretty well. Your filter loses its effectiveness when it gets clogged up. You would have to have a filter for 20,000 gallons to wait 2 months to clean it for your size pond.
 

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