I have four comet goldfish in a 10 gallon with filter and 4 sites. This setup is for chard, lettuce and spinach. The goldies are strong and look healthy, (I've had these fish for about a year), but I'm not sure if that is a guarantee that they are not harboring harmful pathogens. How do I safeguard against harmful pathogens? And if there are harmful pathogens, will they permeate into the plant and thus be harmful for consumption?
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