Optimal timing: The Boum app tells you when the plants need fertilizer

With the 35L Water Tank Pro

Instructions: Connect the solar panel to the controller using the extension cable and place the solar panel in a sunny location

A discrete

One pack = 24 fertilizer balls (depending on the plants

Boum Pro Wassertank 35 L Color:Gray Optimal timing: The Boum appBoum Pro Tank for the Boum Controller. Its 35 L capacity lasts for several weeks, depending on the number of connected planters. No connections required. Discreet tubing. Decorative, made from high quality recycled PET with a hand finished surface. Easy to move, UV and frost resistant.