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Ideal pH for Hardy Water Lilies

Barry asks about the optimal pH for hardy water lilies. Tom recommends a neutral pH of 7.0 to 7.2, with a healthy range of 6.8–7.5. He prefers maintaining pH around 7.0 using natural rainwater rather than chemicals.

Pond and Water Gardening: High-pH Irrigation Water (8.2) Killing Vegetables? Solutions: Filtration, Rainwater Harvesting, and Soil Management; Extreme High pH & Alkalinity in East Texas: 412 ppm Bicarbonate!; Troubleshooting a Well-Fed Pond’s Float Valve System; Controlling Algae in a Sunny Pond: Pumps, Plants, and Realistic Expectations; Cesspool-Smelling Large Pond: No Outlet = Stagnation Death; Motor Oil Spill in Fish Pond: Emergency Cleanup; High pH (8.4) in a 7,000-Gallon Koi Pond: Lowering It Safely; Dividing & Repotting an Overgrown Water Lily; Evaporation from the Captain Cook Memorial Jet: Physics of a Giant Fountain; 13-Year-Old's First Water Feature: Tub Pond Basics

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