With a few exceptions there is very little magnesium in the tap water in most parts of the UK, so you need to keep adding it.cannot find a reading for Mg
Just make sure you dose as per EI, which provides nutrients in excess for the plants.thanks darrel, I will keep putting the Mg in,is there a way of checking wether or not there is too much or too little in the tank so I could adjust my ei mix accordingly,
or is it not that important.
many thanks .roy.
Like "Ian_m" says too much isn't really a problem. Some water naturally has high levels of magnesium (like Lake Tanganyika), but in the UK most of our hard water aquifers are in fairly pure limestones, and they contain very little magnesium., I will keep putting the Mg in,is there a way of checking wether or not there is too much or too little in the tank so I could adjust my ei mix accordingly,