Koi care for spring onwards
Seems to be a great item, does what it's says on the bottle, little unsure to run it through my filters but I did any way but turned off uv light for a day to give it a chance, hopefully I won't need to use it any more this year as I needed 3 bottles to treat my pond, carbon added to filter after use to help remove it and a couple of good water changes, always studie fish when using and do not over dose, I used the max 10ml to 100 gallons, that was 800 ml to my pond three weeks in a row water changes once a week before retreating, I could tell fish were on border line at that ratio so work your gallons out carefully and you will be fine, hope this my help some one good luck healthy koi keeping
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