Math for ppm reduction.

Mak'er Grow

Well-Known Member
Ok, so the average ppm required for creating pollen from a female plant using colloidal silver is 50 ppm from what I've been reading...some use more and some less, but 50 ppm seem to be the average.
I bought some 1000 ppm...4 fl oz bottle.
So I would like to convert it and wanted to make sure my math is correct.

4 fl oz @ 1000 ppm + 40 fl oz distilled water = 44 fl oz @ 100 ppm.
44 fl oz + 22 fl oz distilled water = 66 fl oz @ 50 ppm.

So basically 4 fl oz of CS @ 1000 ppm + 62 fl oz of distilled water should give me 66 fl oz @ 50 ppm ?
 

OldMedUser

Well-Known Member
The math is easier if it's all in mls.

Lets say you want 1L/1000ml at 50ppm assuming that stuff is really 1000ppm CS.

X is the concentrated CS.

Xml x 1000ppm = 1000ml x 50ppm
1000X = 50,000
X = 50,000/1000
X = 50ml

So 50ml of the concentrate in a 1L bottle and top up with distilled water for a litre of 50ppm CS.

4oz is 125 ml so you have enough to make 2.5 batches out of that 4oz bottle.

:peace:
 

Mak'er Grow

Well-Known Member
The math is easier if it's all in mls.
Yes it would be easier if it was in a different volume measurement, but its not so why confuse my brain further with more conversions...lol

Lets say you want 1L/1000ml at 50ppm assuming that stuff is really 1000ppm CS.

Xml x 1000ppm = 1000ml x 50ppm
Its not that I want 1L...I want 50 ppm and what ever amounts used will give me what ever amount in the end.
<Product Link> ...says 1000 ppm, but will know more when I get it my hands.

And "Xml x 1000ppm = 1000ml x 50ppm "...shouldn't the x (multiply) be @?

4oz is 125 ml so you have enough to make 2.5 batches out of that 4oz bottle.
:peace:
4 fl oz = 118.294 ml ...well thats what google conversion says.
 

Mak'er Grow

Well-Known Member
So this is the new calc...in ml.

118 ml 1000 ppm + 1180 ml DW (distilled water) = 1298 ml @ 100 ppm
1298 ml @ 100 ppm + 649 ml DW = 1947 ml @ 50 ppm.

????? :P
 

OldMedUser

Well-Known Member
If you have 1298ml at 100ppm then you have to double the volume to half the ppm.

If you are going to use it all at once then it's

(118ml x 1000ppm) = (Xml x 50ppm)
118,000 = 50X
118,000/50 =X
X=2,360ml total volume

2,360 - 118ml = 2,242ml you need to add to get 50ppm.

I generally don't want to mix up that much at one time but you can if you want. 1L is a decent volume but I have 500ml brown glass bottles with sprayers that I'm going to use to spray STS instead of CS to get pollen from my girls this winter.
 

Mak'er Grow

Well-Known Member
If you have 1298ml at 100ppm then you have to double the volume to half the ppm.

If you are going to use it all at once then it's

(118ml x 1000ppm) = (Xml x 50ppm)
118,000 = 50X
118,000/50 =X
X=2,360ml total volume

2,360 - 118ml = 2,242ml you need to add to get 50ppm.

I generally don't want to mix up that much at one time but you can if you want. 1L is a decent volume but I have 500ml brown glass bottles with sprayers that I'm going to use to spray STS instead of CS to get pollen from my girls this winter.
Thanks so much...was going to give some to a couple friends and figured just make the whole thing at once then put it in to containers, but +2 L is a lot to store...lol
I think I'll just give out a few ml to them and let them convert it down...now that I know the proper way to convert it.
Next step is to see if it works. :P
 

Merlin1147

Well-Known Member
Wow really complicating this. Simply make a 1:20 dilution of the 1000ppm concentrate. In any unit you want drops, tsps tbsps,
 

Mak'er Grow

Well-Known Member
Wow really complicating this. Simply make a 1:20 dilution of the 1000ppm concentrate. In any unit you want drops, tsps tbsps,
Its actually a 1:19 ratio of 1000 ppm to distilled water. (2,242/118=19)
That was the end calculation I was trying to find, but being high and not wanting to waste $, I posted the question...which has been explained very nicely and its easy for people to follow....Thanks again @OldMedUser :)
But thanks for your redundant reply.
 

Mak'er Grow

Well-Known Member
Ok so what would the ration of ml CS/ ml of water with a store bought 30 ppm solution
That depends on what you want the end amount ppm to be.
If your CS is currently at 30 ppm then don't dilute it at all since the average I found that is need to be 50 ppm...yours is less then that.
 
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