Iv always used this for routine health of my koi pond against general parasites etc. I just add every 3 months as a precaution so not really used to action a specific problem. Fish alway seem healthy so just assume its working to keep minor issues away. It is a dark blue dye solution which you can see tinting the water but its only temporary and clears fine. It has an easy fill measurimg top but be careful not to drip any on your hand or any surfaces as it will stain . I keep it held over pond and away from stone edging etc. It will wash off skin but its like ink to remove.
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Tried medifin twice before and didn't work at all. Used Blagdon and within 2 days seen an improvement , after 5 days all my fish looking 85% better ;-)
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Good product, that has had desirable results in a week.
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This product is easy to use, and has sorted the problem I had
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Used this product before and has cured fish issues.
Verified purchase: Yes | Condition: New
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