API Stress Zyme 240ml Aquarium Biological Filter Developer Filter Media For use in fresh and

For use in fresh and saltwater

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As the white polishing pads become clogged with debris

Simply cut the background to fit your aquarium

easy to use

API Stress Zyme 240ml Aquarium Biological Filter Developer Filter Media For use in fresh andAPI Stress Zyme Improves the development of the biological filter and helps clean a dirty aquarium. It contains over 300 million live bacteria per teaspoon. Breaks down organic compounds that cause dangerous conditions such as ammonia and nitrite poisoning and low oxygen levels. Continuous use assures an active biological filter, cleaner aquarium, healthier fish and good water quality. No refrigeration necessary. Use when setting up and maintaining an