When you clean the filter cartridges, look for a turquoise color, which is an indication of copper.
Exactly same result.Use the diluted sample with the 25 ml test and do the modified fading endpoint procedure.
I think that the change to blue is a good endpoint.
Did you use the fading endpoint procedure with the 10 ml sample test?
If yes, how many drops of R-0012 upfront?
Did you count those drops in the total?
Ok, thank you. Did not know. Was just trying to use what I have.Avoid dry acid, it adds sulphate ions which is not good for metal parts or your new surface if they are allowed to build up. Use muriatic acid.
I just replaced the 5 year old cartridges after pebble tec install 4-5 weeks ago. They were green/slimy, but I assume this was from algae (which we had for a year prior to pool demo, thanks to the pool company using trichlor tablets weekly for my saline pool, which apparently never had salt added). Leslie’s measured copper x5 as 0.1ppm since the pebble and refill.When you clean the filter cartridges, look for a turquoise color, which is an indication of copper.
I think that it is probably accurate.Can I trust the 200 CH?
Just wanted to double check if it got the same results.Why did you want me to redo it at 25ml and with fading endpoint test when I seemed to have avoided it with 10ml and 50% distilled water?
Would you raise it to 250 or just leave as is? I live in Phoenix where the water is very hard as it is, so expect it to rise with evaporation and water fills.I think that it is probably accurate.
It depends on exactly what is interfering with the test.
Just wanted to double check if it got the same results.
With a CSI of 0.0, I would leave it as is.My CSI today is 0.0.
You’ve seen proavia’s post #28, that’s it basically. Sulfates or sulphates are the nasty one always implicated with acid mine drainage disaster's. The upper limit is often given as 300ppm and you would have gotten anywhere near that in four weeks. Just switch to muriatic, also known as hydrochloric, HCl or pool acid, and you’ll be good. HCl leaves nothing behind that isn’t already in the pool.Ok, thank you. Did not know. Was just trying to use what I have.
Edit: why is sulphate bad?