Fish health and caring for koi and goldfish ... seek expert advice quickly
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Summary:
Always seek expert advice if your fish have an obvious health problem.
I am not qualified to discuss this subject in any detail.
I would run the risk of causing rather than fixing problems if I said too much.
There is however one area of technical development in recent years that is causing a revolution in koi keeping.
This revolves around a product called Lymnozyme in the USA and called Genesyz in the UK.
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