My test from tf says 14 fc. The test with the tablet says 11. My cc in both tests is .5. Cya is 40. My pool finally went from green to murky blue on Wednesday. It took from june 25 to july 5 to go from swamp to murky blue. No chemicals or pump before june 25. I was using the tablets from last Tuesday until Friday when the refills from TF came. I had to shut off the pump for 2 hours yesterday and I went back to murky green during that time. This morning its back to murky blue. Which dpd should I be trusting?
Tf test dpd powder vs dpd foil tablets
- Thread starter blondemarcello
- Start date
- May 3, 2014
- 58,691
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
How do I tell the difference from fas-dpd and dpd? They both turn the water pink.
- May 3, 2014
- 58,691
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
The dpd is a color matching test.
The FAS-DPD is a titration process.
www.troublefreepool.com
The FAS-DPD is a titration process.
FAS-DPD Chlorine Test
The FAS-DPD chlorine test is used to find the level of Free Chlorine in the … Read more…
www.troublefreepool.com
Which is what both of these are. So I’m back to my original question. Which test results to trust?
- May 3, 2014
- 58,691
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Hi Marcello, I use the tablets too and prefer them over the powder. Is this a new batch of tablets? Try using 2 instead of one. In theory both tablet and powder should be providing an excess of DPD, so should be no difference. If you have another box of tablets from a different lot, you might try that. I order my tablets from Amazon and I have noticed that they do seem to be "factory seconds". For example, one box I received, every foil card had one tablet in the same location where the tablet was discolored (probably a pin hole in the foil). I had another box where each card had an empty "cell" where a tablet should be. I'd think they only sell them because chemically they are good, just packaging problems, but you never know. Also, have you done both tests twice with same results? I would also be sure to be super precise on measuring the sample of your pool water.
The downside of the tablets is that 1 may not be enough and 2 may be more than you need, so a little wasteful. The tests should match as the chemical is the same. Curious if the 2 tablets help match.
I'm curious as to which ends up costing more? Especially if you end up having to use two of those tablets??
Maddie
Maddie