Holland Forge Wholesale Hydroponics Supplies

pH meters must be regularily calibrated using standard pH buffer solutions which are made to an internationally agreed recipe.

Flairform calibration solutions are;

• a highly stable formulation that resists the growth of algae, fungus etc.
• pH buffer 7.0 contains potassium dihydrogen phosphate and disodium hydrogen phosphate
• pH buffer 4.0 contains potassium hydrogen phthalate.
• based on international standard formulas