1) Semi-hydro is not a "savior". Starting with an ailing plant is not the best way to learn.
2) All inert media should be presoaked before use. The porosity of the individual brands will affect the soak time required, but doing so for 24 hours or more is a good standard.
If you don't presoak the medium, it will draw down the reservoir very quickly for a few weeks until it gets to the same degree of saturation and release.
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