cds strength

Hi my friend made CDS but we do not know concentration of it. We have test strips but we do not know how to read this properly us they look little different than showing by Jim on You Tube . The other question is if she used 15ml mms + 15ml citric aside for 1.5l water made by jungle method what the strength approximate can be and how to deluge it properly? I have problem with attaching the photos

It's hard to tell, based on what you've given us.

To test for ppm, combine 1mL of CDS and 9mL of water. I use a shot glass. Dip your chlorine dioxide (not chlorine, not PH) testing strip into that 1:9 mixture as per the directions on the bottle. (I think it's 2 second dip, then 10 second wait, but go by the direction) - determine the strength by the color swatch on the testing strip bottle. Multiply that number by 10 and you will have your PPMs per liter

If the number is "off the scale" high, (i.e., the swatch turns black) you're going to have to redo the test with 1mL of CDS and 19mL of water. Then multiply THAT amount by 20 to get your ppm/L

JH has tried to standardize the CDS to around 3000 ppm/L - there the dosing is 1mL is equivalent to 3 drops of MMS. I usually end up with 6000 ppm/L, and my dosing is .5 mL ..

I, personally, have found that it's easier for me to adjust the size of my doses to equal 3 drops of MMS than to dilute the mixture to equal 3000 ppm/L.

thank you Pam for quick response and lovely advice. Photos.