Captain XTR Algaecide
Best professional-grade solution for eliminating stubborn, thick-matted algae in large water bodies.
Captain XTR Algaecide by SEPRO is the market's most potent, broad-spectrum algaecide, engineered with advanced INFUSION technology to combat all algae types. Its specialized formulation enhances copper penetration into algae cells for superior efficacy, particularly against stubborn mat-forming and gelatinous species that resist other treatments. Featuring multiple surfactants and emulsifiers, it effectively penetrates thick mats and slimy algae, even Lyngbya. This algaecide is safe for use in various water bodies, including ponds, lakes, and reservoirs, with no water use restrictions and minimal environmental impact.
$169.99
Owner Satisfaction
4.7
/ 5
Category Rank
3
/ 1319
#3 in Pool Cleaners & Chemicals
Price vs Category Average
+150%
Above average
Chemical Purpose
Algaecide
/ Algaecide
Who it's for
- Property managers dealing with multiple types of stubborn algae growth
- Pool owners needing immediate relief from visible algae blooms
- Users managing pools with challenging or fluctuating water chemistry
Who should skip it
- Budget-conscious buyers seeking simple, low-maintenance chemical solutions
- Pond owners maintaining sensitive fish or aquatic life habitats
- Homeowners who rely on pool water for irrigation or livestock
Performance breakdown
Algae Eradication Power
INFUSION technology delivers unmatched potency against even the most stubborn mats.
Surface Penetration
Advanced surfactants easily break through thick, gelatinous, and slimy algae barriers.
Water Chemistry Versatility
Maintains high efficacy levels even when treating highly acidic water conditions.
Environmental Safety
Minimal residue profile allows for flexible use across diverse water bodies.
Application Convenience
Large container size is ideal for professionals but cumbersome for small ponds.
Aquatic Life Compatibility
High toxicity levels require extreme caution around sensitive fish species.
Key Specs
Chemical Purpose
Algaecide
Product Form
Liquid
Active Ingredient
Copper
Debris Type Compatibility
Algae
Packaging
2.5 Gallon Container only
Compatibility
Works in highly acidic waters
Safety Note
Toxic to Koi Fish, Trout, Goldfish, and Salmon
Features
- Strongest, broad-spectrum algaecide
- INFUSION technology for superior cell penetration
- Effective against tough algae species
- Bypasses barriers in thick mats
- Works in highly acidic water
- No water use restrictions
- Minimal environmental residue
- Safe for various water bodies
What customers say
Consumers place high trust in Captain XTR Algaecide, citing its exceptional reliability and powerful quality as key differentiators. Reviewers consistently highlight its rapid effectiveness, noting that it clears stubborn algae blooms quickly, often within 24 hours, even in large water bodies. This consistent performance makes it a preferred solution for serious aquatic management. While the initial investment is noted, consumers feel the superior results and straightforward application strongly justify the value.
Know before you buy
Captain XTR utilizes proprietary INFUSION technology, which includes specialized surfactants and emulsifiers. This allows the copper to penetrate the protective outer layers of stubborn, mat-forming algae that typically resist standard treatments.
No. Captain XTR is toxic to Koi, trout, goldfish, and salmon. It should not be used in water bodies where these species are present.
Yes. Unlike many other algaecides that lose effectiveness in low-pH environments, Captain XTR is specifically engineered to remain active and effective in highly acidic water.
There are no water use restrictions following an application of Captain XTR. Once the product is applied according to the label, the water remains safe for its intended recreational or environmental purposes.
Yes. The formulation is specifically designed to break through the thick, gelatinous barriers found in Lyngbya and other resistant, mat-forming algae species.
Captain XTR is available exclusively in 2.5-gallon containers.
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