
Too funny mate! At least you "found" the meter twice now, plus the batteries -
2.6EC is mighty rich indeed, that about 1300+ ppm =

.... one concern besides burn is antagonistic uptake issues associated with it as mentioned earlier,... Are you doing the daily feeds, with about 20% run-off each time, testing pH and ppm going in AND out?
If it's overloaded in there, you need to flush the pot.... The recommendation I saw for coco is to use RO/Di water, with 150ppm Ca-Mg, plus another 150ppm nutes, pH to 6.0; pour through until run-off is at or near input values. This will preserve the coco's bitchy CEC and keep some balanced nutes in there while things recover for a bit....