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Ships within 48 hours · Estimated delivery Jul 25 - Jul 30
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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
4.2 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 2
A greasy mess
SUPER greasy. I have dry skin and it was incredibly greasy for me. It didn’t dry down at all and felt like it sat/slid around on my face.
Obviously goes on clear since it’s a chemical sunscreen. Vaseline gel-like texture in your hand and applies like a silicone barrier. That part makes a little sense since I think dimethicone is high on the ingredient list. Unscented and didn’t test under makeup. I wouldn’t recommend this to anyone and I don’t think I’d try it again, which is disappointing cause I was hopeful with this one after reading reviews!
The glowing reviews versus my experience makes me think folks aren’t applying enough SPF to get adequate sun protection. I’m a skincare girlie so it’s always a half teaspoon for this face.
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Reviewed in the United States on October 25, 2025
★★★★★ 5
Works well, smells great, goes on easily
Sun protection factor: 15 Sun Protection Factor (SPF), Size: 6 Count (Pack of 2)
It smells good. It goes on easily with the spray bottle. It keeps me from burning while out biking. It's a good price. Overall, a very nice product that does what it should. We carry it in our bike packs and in the car when we know we'll be out in the sun all day. Doesn't feel heavy when sprayed on so it smooths over your skin very well. Keeps me from burning.
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Reviewed in the United States on July 9, 2025
★★★★★ 5
Good sunscreen
Sun protection factor: 70 Sun Protection Factor (SPF), Size: 6 Ounce (Pack of 1)
Works well, nice smell, easy to apply
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Get Outside!
Sun protection factor: 15 Sun Protection Factor (SPF), Size: 6 Count (Pack of 2)
Love, smells great!
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Reviewed in the United States on June 7, 2026
★★★★★ 5
My favorite sunscreen!
Sun protection factor: 70 Sun Protection Factor (SPF), Size: 6 Ounce (Pack of 1)
I have been using Hawaiian Tropic sunscreen for years and absolutely love the smell. I wanted to try a spray version as I hate the feeling of oily hands after applying sunscreen. This version sprays on super evenly and has that same beachy smell as the lotion! It stays on for hours and doesn’t leave a sticky residue. My go to sunscreen! With such high SPF as well, this sunscreen truly cannot be best for the value.
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Reviewed in the United States on May 8, 2026