PPM/TDS meter broken?

I just tested the new rain water we got here in Denmark, it is only at 006 PPM and my tap water is about 600 PPM is my meter broken? or is that normal values?
 

Aeroknow

Well-Known Member
I just tested the new rain water we got here in Denmark, it is only at 006 PPM and my tap water is about 600 PPM is my meter broken? or is that normal values?
Sure those #'s are VERY possible. Calibrate, and double check, if that will make you feel better. The 600ppm sucks! Sorry for you.
It sure would be nice to mix those two together 50/50
 
What would happen if i watered my plants with 006 PPM rain water and just ph regulated it?
I water about 3 times a week, 2 with fertilizer, so just the watering in between :)

Would it do any harm to the plant with that low PPM?

I really don't know much about the PPM
 

Aeroknow

Well-Known Member
What would happen if i watered my plants with 006 PPM rain water and just ph regulated it?
I water about 3 times a week, 2 with fertilizer, so just the watering in between :)

Would it do any harm to the plant with that low PPM?

I really don't know much about the PPM
That would be fantastic! If you have a constant supply of rain water. Good storage system?
Btw, i said 50/50, just to make a point of how shitty the 600 ppm is. .5 or .7 scale :D
I should have probably said "at least 50/50;-)
 
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Okay i'm definitely a noob at this ppm thing :p how do i know what scale? i just have the HM TDS3 meter :D

And yes i have a good supply of rain water :D and 2000 liter storage, i only got two plants :p
 

Doer

Well-Known Member
Okay i'm definitely a noob at this ppm thing :p how do i know what scale? i just have the HM TDS3 meter :D

And yes i have a good supply of rain water :D and 2000 liter storage, i only got two plants :p
If you have rainwater and it is under 150 ppm, use that. My hard water is about 450, so I RO my water down to about 80.
 

Doer

Well-Known Member
And ill start using the rain water, but how high should the ppm be in veg and flowering?
Total PPM is all that matters. For me it is about 150 ppm per foot of height. 10 foot ganja trees need a lot. My 4 footers get about 600.
 
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Aeroknow

Well-Known Member
And ill start using the rain water, but how high should the ppm be in veg and flowering?
I looked up ur meter online, and it looks like it .5
Your 600ppm @.5 is heinous!
Google "tds conversion chart"
Start young ones at around .5 EC, then work your way up to around 1.5EC. Possibly higher
 
I looked up ur meter online, and it looks like it .5
Your 600ppm @.5 is heinous!
Google "tds conversion chart"
Start young ones at around .5 EC, then work your way up to around 1.5EC. Possibly higher
As said, i have no knowledge at all in ppm/ec :) i don't know if my ppm is too high or too low
And i don't know how to convert my ppm reading to ec
 

Doer

Well-Known Member
Almost all the conversion is .5. That seems to be the RIU standard.

I can't begin rooted clones at 500ppm, too strong. But when they get rooted and grow a bit, then they are much less sensitive to concentration.
 
Almost all the conversion is .5. That seems to be the RIU standard.

I can't begin rooted clones at 500ppm, too strong. But when they get rooted and grow a bit, then they are much less sensitive to concentration.
I have never been concerned about the ppm, until i got a TDS3 meter, and i found out that i always have been watering with a ppm over 500, but my GreenHouse Seeds Cheese has never had a single problem, and is growing like crazy

33 days old 19.3 inches, growing about 1.2 inches up in 24 hours
IMG_3431.JPG IMG_3433.JPG
 
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