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I've looked on over grow and and it looks like so many of th epictures i cant really tell what it is. Some other leaves a little high up have some minor spots the same color. iTs not calcium or magnesiumbecause i put cal-mag in there. Setup is a bubbler. Never any problems with PH.
For me it's a over fert burn. I had that before in bubbler also. EC must be to high, lower the EC putting only water or flush with PH balanced water during a few days ( 2 or 3 ). But maybe an expert can commit ?
Fhydro
yup do a flush with Ph adjusted RO water.
Where can you get RO water from? Is normal bottled watter RO water?
also, How long should i flush the plants for?
Most bottled water will have a label that tellss you how the water was processed.
Read the label and look for the Reverse Osmosis description.
I like the water that is R.O. and has minerals added back in for flavor. (I know, plants dont care for flavor, but they do like the added minerals...)
Sorry I cant help anything else fellas but when it comes to bubbler....there is only ONE MASTER and his name is.....
ZANDOR :D