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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29
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Description
knockout herbicide CrystalClear KnockOut PlusCrystalClear 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
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.
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.
- 7 Day Treatment
- Remedies Ich, Parasites, Bacterial Infections & Fungus
- All Natural, Safe for Fish, Plants & the Pond's Ecosystem
- Prevents Future Infections
Dosage Rate
Use 1 fl oz of KnockOut™ PLUS per 60 gallons.
8 fl oz bottle treats up to 960 gallons.
128 fl oz / 1 gal bottle treats to to 7,680 gallons.
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.
Use 1 fl oz of KnockOut™ PLUS per 60 gallons.
8 fl oz bottle treats up to 960 gallons.
128 fl oz / 1 gal bottle treats to to 7,680 gallons.
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.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Product quality.
This is a 1st time we are using this product; it seems working as it should, build quality is good for the price.
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Reviewed in the United States on September 11, 2025
★★★★★ 5
Great item!
Great item a must buy 😁
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Reviewed in the United States on April 21, 2026
★★★★★ 5
Fits 2007 Honda crv.
It fits my 2007 Honda crv and sealed very well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
★★★★★ 5
Fits 2007 Honda CRV
Fits 2007 Honda CRV.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2025
★★★★★ 3
Filters well but causes air flow restrictions
Very thick and does filter well however it is so thick it actually blocks quite a bit of air flow
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 27, 2020
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