WD-A1-RO Filter for A1 RO Hot Cold Water System pump Two-way humidity control means the

Two-way humidity control means the pack both adds moisture when the environment is too dry and absorbs moisture when it's too humid — actively maintaining the target 62% RH rather than simply drying the air like a one-way desiccant

A good alternative that we Botanicare recommends is the Mother Earth Meal Mix Grow and Bloom:

Combine it with the Bluelab Solutions and the convenient Bluelab Carry Case (item BLU7000)

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WD-A1-RO Filter for A1 RO Hot Cold Water System pump Two-way humidity control means theRO Filtration The high quality RO membrane is a core element of this filter. It effectively eliminates bacteria, viruses, heavy metals, and other harmful substances, delivering pure and healthy filtered water for your drinking pleasure. *The data is from a third party lab. NSF ANSI 372 Certified Provides you with healthy, tasty water. SGS Tested Tested according to NSF ANSI 42&53&58 standards Reduces 99. 99% of total coliforms Extended Service Life