I grew my plant outside for the first few months with no nutes at all. It grew in a pot and it only got rain water. I have been giving it some food for the past few weeks but I would say I didn't do anything to it for 3 months and it is green and healthy. The fan leaves on the way bottom are looking yellower but I heard that is normal.
Wow your lucky that is super clean water. If I had that coming out of my tap I would drink it. Mine is about 450ppm at 6.6 ph, if I leave it out over night it evaporates to 7.2 ph and I lose 0 ppm.i cant see the tap being high ppm and no ph to it. meaning a high ph also, i have 7.04 ph and 20 ppm tap here and of course you need to adjust the ph to suit what medium your in.
The point I was trying to make was about the Total Alkalinity of water turning the smallest amount of fertilizer into poison. No arguments here mixing back tap is a bad idea, but some people do it and that is why. Tap will only kill microbes if you dont let the chlorine evaporate, but its still garbage heavy salts in the water and not enough usable Ca. Total Alkalinity is very real I assure you its not a sales gimmick. Those sites just explain it well I thought, if you really read it through and dont pay attention to the sales pitches. Check the 4th paragraph down on the 2nd link it couldn't be any clearer than that. Alkalinity is the real issue, ph tricks alot of people this way. And as far as the problem posted by the OP, he wants to know why such a small amount of fert is frying his plants, that is the issue here right?and that source isnt useable by the plant so it does nothing and blocks the good we use in almost every bottle of food there is out there. and in soil we barely need any of it. its more for coco not soil
both them links are sales pitches from a co tryin to sell you a filter. or food. adding back tap will kill microbes we want so is a waste of time doing that
the water rises cause the o2 is leaving the source. all water even bottled does this