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Control the PH of your water/feed solution by using Ph up/down to maintain the balance to ensure all nutrients are available to the plant. PH control is important in the cultivation of orchids and all plants.
Most orchids will thrive in a PH range of 5.5 - 6.5, it is wise to do a little research on your specific plant.
PH UP Contains potassium hydroxide
PH DOWN Contains phosphoric acid