Hydroponics New Items Growth Technology - PH Probe Cleaning Solution 300ml Growth Technology PH Probe Cleaning Solution 300ml keeps clean the pH probe to have accurate measurement. ... Growth Technology - PH Probe Cleaning Solution 300ml Growth Technology PH Probe Cleaning Solution 300ml keeps clean the pH probe to have accurate measurement. In Stock €8,49 Add to cart Thermometer Ideal for monitoring the growing environment. It is important not to let temperatures rise too high or fall too low. This quality thermometer is ideal for this purpose and is ready for wall mounting. In Stock €9,89 Add to cart