Can I mix 5 cc of tap water (no chlorine) with 5 cc of pool water to reduce the amount of reagent needed to complete the test while SLAM'ing? My assumption is that it would be 1 ppm per drop rather than .5. I'm not sure if the test actually works that way though....
FAS-DPD Chlorine Test at high levels
- Thread starter saltyzoo
- Start date
Just use 5ml of pool water. Each drop will count as 1 ppm. It will not be quite as accurate but it will more than likely be close enough for your purposes.
The results would get skewed if you mixed with tap water since in most areas chlorine is added to water for disinfection. Some jurisdictions allow up to 4 ppm.
The results would get skewed if you mixed with tap water since in most areas chlorine is added to water for disinfection. Some jurisdictions allow up to 4 ppm.
- Dec 23, 2014
- 163
- Pool Size
- 14000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Jandy Aquapure 1400
you could always use distilled or bottled water. you'd be saving drops, but not really on the powder, but of course, youre BLOWING through drops at slam levels.
bdavis466 is right on the money, a 5ml sample produces results equal to 1 ppm/drop. No need to mess with any dilution.
That was my reasoning. Figured losing a bit of accuracy at 35 ppm isn't going to make a huge difference.
Thanks guys!
I find using a syringe (like you can get for liquid meds at a pharmacy) works well for measuring the 5 ml - gives me more confidence that the FC value is reasonably accurate when doing FC test with less reagent.