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Crystal Clear 1 Gallon Knockout Plus

SKU: CRY-KOP1G
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$88.99

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Crystal Clear 1 Gallon Knockout Plus


  • 7 Day Treatment
  • Remedies Ick, Parasites, Bacterial Infections & Fungus
  • All Natural, Safe for Fish, Plants & the Pond's Ecosystem
  • Prevents Future Infections


CrystalClear® KnockOut™ PLUS is an all natural, fish treatment that eliminates PLUS prevents external single-celled parasites or fungal infections.


KnockOut™ PLUS works extremely well with pond fish species such as koi and goldfish and unlike most fish treatments, there is no need to remove your filters before treatment. Furthermore, when used routinely, KnockOut™ PLUS works as a strong preventative treatment. Use anytime new fish are added, during pond clean-outs, during spring start-up or any time fish are stressed.


KnockOut™ PLUS is a broad spectrum treatment for a variety of parasites including ichthyophthirius (Ick), sporozoan parasite, dinoflagellate infections as well as fungi such as saprolegnia, achlya, leptomitus and pythium. May be used with most invertebrates including snails.

Dosage Rates



Pond SizeKnockOut PLUS
Up To 60 Gallons 1 Ounce
Up To 120 Gallons2 Ounces
Up To 240 Gallons4 Ounces
Up To 480 Gallons8 Ounces

Standard Application Rate


Shake well before using. Upon discovery of infection, apply daily for 7 days. When there are no visible signs of infection, it is recommended to continue treatment daily for an additional 3 days to ensure infection will not return. Disperse over the majority of the surface area of the pond.


Persistent Problem Application Rate


Shake well before using. For infections that last more than 7 days after standard application, treat twice per day. Apply once in the morning and once in the evening. Do not apply as a bath application. KnockOut™ PLUS works best as an in-pond additive.


Preventative Application Rate


Treat daily for 7 days anytime new fish are added, during pond clean-outs, during spring start-up or any time fish are stressed.


Product Notices


Do not use other chemicals in pond while treating with Knockout™ PLUS.

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