It's critical to fill the tank with water only, and no plant food when you start germinating your plants. Plant food can hamper germination and prevent your seeds from sprouting.
How to Fill Your Water Tank
If you're filling your tank with the lid off, pour in water until the waterline meets the top of the smaller ribs inside the tank, as shown below.
If you're filling your tank through the opening in the lid, pour in water until it reaches just below the bottom opening of the plastic funnel in the open compartment, as shown below. Stop before the water reaches the plastic funnel.
Please note: Adding water beyond these points can potentially damage your device.
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