Tackle stubborn black algae fast with Applied Bio Black Algaetrine, a concentrated algaecide specially formulated to destroy tough black and blue-green algae growth on pool surfaces.

This professional-strength formula penetrates deeply into algae roots and porous pool surfaces, eliminating the problem at its source. Safe for all pool finishes, Black Algaetrine helps restore clean, clear, and healthy water while preventing future outbreaks when used regularly.

✅ Targets and kills black and blue-green algae
✅ Penetrates deeply for complete algae removal
✅ Works with chlorine and bromine systems
✅ Non-foaming, surface-safe formula

Size: 32 fl oz (1 quart) Bottle

💧 Use as a spot treatment or part of your weekly maintenance routine to keep your pool algae-free and crystal clear.