Having read some links here, I know I need to go away and do some further testing before bugging you too much. However....can someone give me just a bullet list of things that can eat chlorine and cause a zero read out. At first I thought it was old test chemicals but am getting same with a new test kit. (not strips). Pool has be fine for years...but this year....Mustard algae (anyone else suffering in the Houston area with this problem so early in the season and a completely 'white' test water sample after the drops are added to the test sample.?
Here's my latest test samples.
All pool water - Clear (white), no pink whatsoever.
1/2 pool, 1/2 bottled spring water - Clear, no pink whatsoever.
All tap - 1CL / 2Br
1/2 pool, 1/2 tap - .5CL / 1 Br.
I'm using my standard amount of Leslies' pool pucks and put 2 lbs of shock in about 10 days ago.