CrystalClear® KnockOut™ PLUS Broad-Spectrum Disease Treatment Color Changing Zinc Sulfate

Zinc Sulfate

a molded-in 90° elbow

Facilitates healing and reduces fish stress

Combining mechanical and biological filtration in a small footprint

CrystalClear® KnockOut™ PLUS Broad-Spectrum Disease Treatment Color Changing Zinc SulfateCrystalClear 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