1.Board-spectrum, high efficiency 2.Has a strong effect of suppression and extermination to bacteria, fungi, algae ... the preferred product in water-treatment germicide. SPJ-6400 is a board-spectrum, high efficiency, low-toxicity non-oxidizing germicide. The product ... the bio-film slime attached on the wall, and has a strong effect of suppression and extermination to bacteria, fungi, algae ...