Cold Water Beneficial Bacteria

Cold Water Beneficial Bacteria for Ponds

Standard beneficial bacteria products go dormant when water temperature drops below 50°F — leaving your pond without biological filtration during fall and winter. Cold water beneficial bacteria formulas contain specially selected bacterial strains that remain active down to near-freezing temperatures, continuing to break down organic waste and maintain water quality through the coldest months.

When to Use Cold Water Bacteria

Begin dosing cold water bacteria when pond water drops below 55°F (typically mid-fall) and continue through winter until water warms back above 55°F in spring, when you can switch back to standard formulas. Dose according to package directions — do not skip winter doses even though the pond appears dormant. Pro tip: cold water bacteria also reduce the spring ammonia spike that occurs when koi emerge from dormancy and begin producing waste before the nitrogen cycle fully restarts.

Play It Koi offers free shipping on orders over $99. Questions? Contact our pond experts for cold-season bacteria advice.

Related Categories

All Beneficial Bacteria · Fall & Winter Supplies · Pond Heaters · Water Treatments · Pond Test Kits