Instructor demonstrates small hydroponic system setup, stresses pH checks and hydroponic-only inputs
A presenter demonstrated a small hydroponic system, showing pump and air-stone setup, raft placement and pH testing; the instructor warned to use only hydroponic-specific fertilizers and to adjust pH with appropriate acids.
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An instructor demonstrated a small hydroponic system and walked attendees through pump adjustments, air-stone placement, raft installation and pH testing.
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