Pen has been working fine all weeks and plants looking okay. Not the best but cuttings so need to just get going type thing. Anyway I pot them all up tonight and mix up some notes. 1ml of ph down into 6 litres. Reading 6.5 or something I forget now. So add some more ph down and still reads the same.
Here's the thing, I have had that happen before in the past. As if the pen isn't picking up the extra ph down added. It reads on point but just feel sometimes if get it wrong then adding more ph down isn't recognised. Have rinsed the pen and in about half an hour going to recalibrate it. Then mix a whole new batch up although I've given them a light feed with the water I had left over. Just to stop them going dry. Will recalibrate and see how it does if not good then ill be ordering a new pen. Shop near me doesn't seem to sell essentials ph pen. Which means ordering online. So praying it works.
Anyone else had similar happen? Take a reading add more and doesn't seem to change the reading? In the past I would add more until it went down and wind up burning plants a little.
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