Alkalinity Test Turns Pink/Red
I used a test kit to test my water. The sample turned pinkish red with just the alkalinity indicator drops.
Does that mean my alkalinity is 0? I have approx 20,000 gal water and right now algae is growing faster than I can clean it out.
Thanks for the question
What kind of kit are you using, a K-2005, 2006, or a yellow OTO test kit?
For the K-2006 kit be sure you're using the right amount of Reagents and in the right order.
R-0007 is Thiosulfate, then 5 drops of the R-0008 Alkalinity indicator, then count the drops of R-0009 until it turns from green to red.
If you have green, then one drop later it's red, and you know you're doing everything right, chances are the TA is only 10ppm. This is much too low. To confirm that I'd encourage you to take a sample of pool water to your local pool store for analysis.
If you're using the OTO kit the color should go from blue to a yellowish/clear color. There shouldn't be any red in there.
If you are in the early stages of an algae bloom I'd like to have the rest of your chemical readings:
Chlorine, CYA (cyanuric acid/stabilizer), pH, Calcium Hardness, and Metals (iron and copper).
It makes troubleshooting much easier and the process of clearing up your pool will go much faster.
You can get this done at your local pool store. Without these numbers I'm just guessing at what the problem is.
Get back to me with the rest of the chemical numbers and I'm sure I can help.
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Hope this helps and have a great Summer.