I have been using the DPD testing powder 0870 for only a short while.
I am thoroughly enjoying the precise numbers it will give.
But I have recently come across a head scratcher.
I just opened a pool not 7 days ago.
It was a bit green but nothing I couldn't handle.... Or was it?
I initially shocked the pool with Cal-Hypo, that did most of the green in.
I removed the dead algae by vacuuming to waste. The FC levels dropped, as expected.
So I hit again with Cal-Hypo. And again wasted the dead algae. The water tests
As of this morning are as follows.
But then I went to the reliable DPD test for the FC, and here comes the curveball. I put in the
two scoops of 870 then I ran the next part of the test with the drops of 871. It went
From a very light to pink to a very dark pink on the second drop. The 871 is suppose to change the pink to clear to give you the FC ppm. But it does the opposite it goes pink then pinker then clearer.
Of course once it goes clear I test the CC with the 003 drops and get a reading of .5 or less
When I test again using the tests strips I get a very low FC reading.
Versus the test using the DPD and 871 drops.
Anybody have any idea what might be going on here?
Why is the 871 test drops turning my sample pink when it is suppose to be turning it clear?
And to top it all off the pool is very cloudy at this point... Clearing up ...but slowly.
Does anyone suppose the cloudiness may have something to do with this whole testing kanundrum?
Thanks for any help here,