January 22
Photo: eurohydro.com
In recirculating systems, the pH should be measured on a daily basis, since changes in the nutrient solution made from the plants themselves can cause significant fluctuations.
In any case it has to be added whenever the measurement of water or fertilizer.
To maintain stable acidity may wish to use nutrients that provide a " cushioning effect "or buffer , and temperature control (less than 30 degrees) and humidity (above 50%) to reduce the 'excessive evaporation.
To make the measurement will proceed as for the EC, to mix the solution thoroughly and take a sample with a clean container.
And 'good not to take measurements immediately after the addition of fertilizers or regulators.
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