Co2 Question - How Long To Hit 30ppm

At the bottom where it meets the water, the hollow piece is filled with some white misty/jelly looking stuff!!

Think I may junk it soon and use bubble count and 24hr PH tests.... :blink:
 
Try JBL it takes Kh in to account and also shows Ph with 2 deferent color charts
 
I am at work now I'll try to get one for you this evening or post a link if i find one
 

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