CYA Test

mknauss

Mod Squad
May 3, 2014
11,857
0
Laughlin, NV
#2
No. With practice, it is fairly easy to do.

With the sun at your back, fill the tube to 100, glance for the dot with the tube at waist level, if you see the dot, fill to 90, glance, repeat.

After you get a value, pour the sample back into the dropper bottle, and do it again. Average out several tests rounding up to the nearest whole 10.

Take care.
 

Seadweller

Well-known member
Aug 21, 2009
155
0
Tampa Bay Area
#3
Ah, I didn't realize you could continue to redo the test with the same sample. I understand the test is subjective, but I seem to be at the extreme with the varying results I'm getting!
 

mknauss

Mod Squad
May 3, 2014
11,857
0
Laughlin, NV
#4
Even better is to get another person to do the test along with you. Different eyes.

Be sure to 'glance'. Staring at the dot will trick your eyes into seeing it.
 

Richard320

LifeTime Supporter
TFP Expert
Jan 6, 2010
20,322
1
San Dimas, CA (LA County)
#5
There's no shame in repeating the CYA test a dozen times until you get close readings 3 or 4 times in a row.

If you the OCD type, there's also a CYA standard.... you mix it up and figure out a test procedure that gives you the right reading. Then do exactly the same thing with the pool water sample.