I only did coco for 1 season starting, so I'm not by any means an authority. I agree with Rab you should never give your coco plants pure water, unless you want to flush them right before harvest. I found a thread, I'll take a look see if I can find it again, it talks about instead of once a day large feeding, to split it up into smaller, multiple feedings. The way a body builder eats a bunch of smaller meals to gain mass, something to do with keeping the metabolism sped up I think. If you were watering 2 liters a day, once a day, you could split that into 1 liters twice a day, .5 liters four times a day, .25 liters eight times a day, basically as often as you want to go in there, or can setup a machine to do it for you.