How long is the green dye meant to last in the water i mean the colour

I usually Leave it a day and then fill a glass with water from the pond. If it is clear, I turn the UV back on (it is usually clear).

Can this be used in winter?

I personally do not apply any treatment if the pond water temperature is below 10 Celsius. Under the FAQ section of NT Labs Koi Care - Acriflavin it states: "The minimum "effective" water temperature when applying a treatment/medicine is 10 degrees Celsius. At lower temperatures, everything happens more slowly. Below this temperature treatments may be less effective. Please note that ALL fish keepers have a duty of care to the fish and it may be necessary to treat anyway."

Can this be used same time as fmg please?

Not sure what FMG is? But it's not recommended to use anything else at the same time

How much do i use in 100 gallons

You need to use 10 ml of product t 80 imp gallons.

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🛡️ Shield your koi with the ultimate bacterial defense—because your pond deserves the best!

TRUSTED LEGACY - Backed by 40 years of industry expertise and koi enthusiast trust worldwide
OPTIMIZED POND CARE - Compatible with UV filtration pause and aeration for maximum treatment efficiency
COMPREHENSIVE HEALING - Effectively treats fin, tail, mouth rot, and ulcers for visibly healthier koi
EFFORTLESS APPLICATION - Simple dosage calculation and easy pond surface application—no guesswork needed
POWERFUL ANTISEPTIC DEFENSE - Clinically proven 80mg/100ml Acriflavine neutral targets bacterial infections fast

Koi Care Acriflavin is a 500ml liquid antiseptic treatment containing 80mg/100ml Acriflavine neutral, designed to combat bacterial infections such as fin, tail, and mouth rot, as well as ulcers in koi fish. Trusted for over 40 years, it offers an easy-to-use, 7-day treatment protocol that integrates seamlessly with pond maintenance routines, ensuring your koi stay healthy and vibrant.

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Pet Type	Fish and Aquatic
Package Dimensions	21.5 x 7.9 x 6.6 cm; 552 g
Item model number	NT Labs
Item Form	Liquid
Colour	White
Size	500 ml (Pack of 1)
Quantity	1
Specific Uses	Outdoor
Batteries required	No
Item Weight	552 g

NT Labs Koi Care Acriflavin, Koi Medicine, Koi Treatment for Fin, Tail & Mouth Rot and Ulcers, Treats Bacterial Infections in Koi, Quarantine Solution for Koi, size - 500ml

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