Campden Tablets
Tuesday, February 27th, 2007My tap water is sanitized with chloramine. I wanted to experiment and see how I could eliminate chlorine/chloramine from my municipal tap water.
I purchased a bottle of 25 test strips intended for home aquarium use. The product used was Lifegard brand Chlorine/Chloramine Test Strips from Pentair Aquatics. $17.99 retail, Part Number R440006
Chlorine/Chloramine Test Strips
Simple to use. Dip a strip in you water sample for 2 seconds, remove and wait ten seconds. Presence of chlorine/chloramine (test does not make a distinction) turns the test strip a progressively darker purple color. Compare test strip to color chart on bottle to determine chlorine or chloramine concentration. The scale on the bottle reads from .1 PPM to 10 PPM with 6 steps between. A zero PPM chlorine/chloramine reading is white or no change of color.
Here are the results of my test results:
1- Tap water, unfiltered: 3 PPM (I understand this is a typical concentration level)
2- Tap water, filtered with PUR faucet mounted carbon filter: ~.5 PPM
3- Tap water, filtered with 5 micron carbon water filter: ~.75 PPM
4- Tap Water, filtered with 5 micron carbon water filter & 1 campden tablet per 5 gallons: no reading
5- Tap water, unfiltered with 1/2 campden tablet per 5 gallons: no reading
6- Tap water, unfiltered with 1 campden tablet per 5 gallons: no reading
Note: I took readings 5 & 6 very quickly after adding the campden tablets.
Conclusion: Campden tablets are very effective at removing chloramine. You will probably use 1/2 a tablet per 5 gallons. Check with the supplier of water and ask about concentration levels of your water. I do not know of any side effect of over using campden tablets some, say 1 tablet per 5 gallons. Use your best judgment.
zymot
