NaturalPond™ All-Season Liquid Beneficial Bacteria Flow Rate at 5 Feet of Head_5369 GPH Each of these bacteria is

Each of these bacteria is recognized as safe

It's compact size allows it to fit in virtually any skimmer

do not exceed 6 teaspoons for every 10 square feet of pond surface

the magnet is very long lasting

For 2020 models and older:  The correct model is the WH5-120-L

NaturalPond™ All-Season Liquid Beneficial Bacteria Flow Rate at 5 Feet of Head_5369 GPH Each of these bacteria isNaturalPond All Season Liquid Bacteria is a professional strength formulation of specially selected photoreactive bacteria strains that clear up sludge and muck to help keep your pond looking pristine in all seasons. Activated by sunlight, NaturalPond All Season Liquid Bacteria continues to digest fish waste during water temperature changes and dormant fish months. Safe for fish and aquatic flora. Concentrated photoreactive bacteria Perfect for