I've been a BBB for a couple of years with some good and some not so good seasons but mostly good and easy seasons. This season I'm having trouble figuring out what to do here. Can I get some help with these numbers?
First of all, my little pool has sparkling clear and beautiful looking (and smelling and tasting) water. However, yesterday I noticed a brown discolouration all along the bottom edge of the pool. I've never had this before. It doesn't come off with just a simple scrub. I'm thinking it's directly related to some of these wacko numbers. On Tuesday I dumped a some old BORAX (3 lbs) and about 16 oz of left over PH UP to get the PH up and wondered if that caused the brown staining. I've read up on testing the stain with vit c or clorine to see if it's metal or organic but haven't had a chance to get in today. The stain looks lighter in the areas where the sun has been all day today.
By the TROUBLE FREE TEST box top:
TC 5.0 (right you add FC & TC)
pH -6.5?? I can't even get a reading on this. The Phenol red turns YELLOW in the tester
TA 0? (I followed instructions and the tester didn't start with green it went straight to BRIGHT RED/PINK)
CYA 150? (not sure here because the dot block out about 1/2 way between the bottom and 100 mark. I used pucks in the winter and just learned that shock also has cya in it even though I mostly use 10% bleach during the season.) I suppose I will be draining 69% of the water at some point as the POOL CALC suggests. But until then ... .
Temp 82 degrees - nice!
4,500 to 5,000 "Splasher" Vinyl pool
Any ideas? Where do I start?