High Iron Well-Water killing my plants?

Justin Freidman

Justin Freidman

Well-Known Member
Hey Mate, thanks again for the reply.

The pH on the first day was 5.6 and EC 1.1, yesterday it was 6.0 and EC 1.1 and today it was 6.3 and EC 1.0. So I topped back up to EC 1.1 and pH 5.6.

I was going by this for calculating the EC of 1.1:

"Lets start with the small print on the bottles. What many do not know: the recommended EC value is based on osmosis water with an EC of 0,0!
Example: Ionic recommends an EC of 2,0 for flowering in hydroponics. From this value the cultivators must deduct the EC of their tapwater in order to calculate the actual recommended dosage. Let's say your water has an EC of 0,6. Then we calculate 2,0 – 0,6 = 1,4 EC. The recommended maximum dosage is therefore 1,4 EC."

https://www.rollitup.org/t/ec-by-joe-camel.928508/#post-13181569

They seem to be doing well now, shall I just leave it at 1.1? Or raise it to 1.2 or 1.3? I have some calmag coming in the next few days, so will mist with it like you advise.
 
im4satori

im4satori

Well-Known Member
Justin Freidman said:
Hey Mate, thanks again for the reply.

The pH on the first day was 5.6 and EC 1.1, yesterday it was 6.0 and EC 1.1 and today it was 6.3 and EC 1.0. So I topped back up to EC 1.1 and pH 5.6.

I was going by this for calculating the EC of 1.1:

"Lets start with the small print on the bottles. What many do not know: the recommended EC value is based on osmosis water with an EC of 0,0!
Example: Ionic recommends an EC of 2,0 for flowering in hydroponics. From this value the cultivators must deduct the EC of their tapwater in order to calculate the actual recommended dosage. Let's say your water has an EC of 0,6. Then we calculate 2,0 – 0,6 = 1,4 EC. The recommended maximum dosage is therefore 1,4 EC."

https://www.rollitup.org/t/ec-by-joe-camel.928508/#post-13181569

They seem to be doing well now, shall I just leave it at 1.1? Or raise it to 1.2 or 1.3? I have some calmag coming in the next few days, so will mist with it like you advise.
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sounds like the 1.1 is working for you
in my opinion I would leave it
when you add your calmag its going to drive the EC up more

I understand the small print.. don't think in terms of adding or subtracting.. just think in terms of what total EC works best for my plants while using the 0.4 source water
 
Justin Freidman

Justin Freidman

Well-Known Member
I followed a different guide to end up with an EC of 1.6 originally. I started at one and checked each day, the EC dropped, so I added more solution each day until it didn't drop any more. I got up to 1.7. At 1.7 the EC went up, so I dropped to EC 1.6 and it stayed there. This seems to be when the issues started.

Weird, because now at 1.1 it stays the same and pH rises.

I'll stick at 1.1 for now as they seem to be doing great. Can't wait to get the well water analysis done, so I can see where I'm at. I'll post it on here. Thanks again for all your help!
 
im4satori

im4satori

Well-Known Member
you must have been in that grey zone where it was too much but not too too much lol

I wouldn't be surprised if you can do EC1.3 to 1.4 ish but your safer at the lower number for now until you get it dialed in
 
im4satori

im4satori

Well-Known Member
Justin Freidman said:
So I'm guessing having too high EC doesn't automatically mean nutrient burn? i.e. the burn on the tips of leaves?
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no not at all
nute burn means you've fed way too much

but you can have mild growth issues even if the EC is slightly high but not high enough to cause burn or curl

when I first started I fed EC 1.8 as recommended to me by somebody

then my plants starting suffering and some other guy says.. feed them! so I give them 1.9

they never burned

many years later i now feed 0.9 in flower which is half and all is great
 
im4satori

im4satori

Well-Known Member
that's not to so 0.9EC is good for you

I run a different type system than you so I can get away with less
 
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