Chlorine - how too measure reservoir levels

doctorwsj

Member
So I bought a chlorine test kit (strips) 0 -10 PPM.

I added about 30ml to 45 gallon reservoir and basically no reading, I ultimatly had to add 100 + ml and then I received a 1 PPM reading but only for about 5 or 10 minutes then not detectable again.

So is it oxidizing my nutrients that quick or what am i not understanding about this. I thought I should be able to have a residuale 1 PPM level but OMG how much would that require?

I then tool just 25ml to a 55 gallons of clean water and it retained a residual of 2 PPM for over a day so far??

Please explain someone....
 
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