have you considered using PVC pipe and some 90° adapters ? If you place a table next to the plant and have the water above Where the PVC starts, you could also install a PVC Ball Valve to have gravity start the drain/water
Try to water the soil close to the stem and within the upper diameter of plant growth i dont think the roots will spread much further then that, well not roots you need to worry about
Quindi nutro la pianta, aspetto 30 minuti, riempo di terriccio un vaso diametro 15 centimetri con il terriccio preso vicino alla pianta, verso 150 ml di acqua distillata, raccolgo i primi 50 ml che escono da sotto e misuro ec e ppm.....e' corretto????
Shit...sorry...So I feed the plant, I wait 30 minutes, I fill a 15 cm diameter pot with potting soil taken close to the plant, towards 150 ml of distilled water, I collect the first 50 ml that come out from below and I measure ec and ppm .... .it's correct????