Fungus, Finrot and Bacteria Treatment. eSHa 2000's wide range action treats over 18 symptoms and diease organsims. eSHa 2000 treats a wide range of fungal, bacterial and parasitic infections, helps heal wounds and protects the skin layer. The very low toxicity makes it safe to use with sensitive fish, even when accidentilty overdosed. Treats 800 litres (175 gallons).