water hardness and PPM

Chimone

Well-Known Member

• Sep 14, 2013

• #1

We have pretty hard water, its right there at 170. When following a guide for nutes, for example it calls for a PPM of 1000, is that 1000 total or 1000 on top of my current water hardness of 170?

 

mr2shim

Well-Known Member

• Sep 14, 2013

• #2

Those tables are based on 0ppm water

 

Chimone

Well-Known Member

• Sep 14, 2013

• #3

mr2shim said:

Those tables are based on 0ppm water

Click to expand...

yes, so my question again......If Im shooting for a PPM of 1000, is that with my current hardness or do I take it to 1170?

 

ButchyBoy

Well-Known Member

• Sep 15, 2013

• #4

I would like to know the answer to this also.

 

Jimdamick

Well-Known Member

• Sep 15, 2013

• #5

You would need 1000 total, so 830 ppm would have to be added to bring your total PPM up to 1000 PPM

 

L

lospsi

Active Member

• Sep 15, 2013

• #6

Jimdamick said:

You would need 1000 total, so 830 ppm would have to be added to bring your total PPM up to 1000 PPM

Click to expand...

yep that;s right

 

C

CC Dobbs

Well-Known Member

• Sep 15, 2013

• #7

It is not as simple as just adding numbers together. What is in your water that is causing it to be at 170 ppm? If you know what it is you would need to adjust your fertilizers to account for whatever is in the water.

 

intenseneal

Well-Known Member

• Sep 15, 2013

• #8

Yeah you need to add nutes to bring your ppm up to 1000 so you include the 170 from you tap water. 170 ppm tap water is not that bad at all I would use that after running through a carbon filter. My tap water is over 400 ppm. The issue with tap water is you dont now what that 170 ppm consists of so I always say filter your water. I have a 90 gpd RODI filter that I use.

 

mr2shim

Well-Known Member

• Sep 15, 2013

• #9

intenseneal said:

Yeah you need to add nutes to bring your ppm up to 1000 so you include the 170 from you tap water. 170 ppm tap water is not that bad at all I would use that after running through a carbon filter. My tap water is over 400 ppm. The issue with tap water is you dont now what that 170 ppm consists of so I always say filter your water. I have a 90 gpd RODI filter that I use.

Click to expand...

Exactly, however 170ppm is basically the best tap water ever so I wouldn't worry too much about using RO filters personally. My tap is around that and I've been using non pH'd tap for a while and it doesn't make a difference between that and 0 ppm distilled.