I recently purchased some Muriatic acid and it was yellow in color I noticed it took one and a half times the normal measure to reduce the pH by the same amount versus the clear Muriatic acid I normally get, the manufacturer was the same.
At the hardware store I normally purchase the acid from I did notice the container was dusty, on asking the assistant manager he stated that since home construction was slow in Hawaii they have been selling less. In addition I always unscrew the cap to make sure it has never been opened and I did notice the normall shiny stainless steel caping over the clear plastic cap looked mottled. Next time I will be more picky. I normally feed acid automatically but the pump is broken and the new one has yet to be installed.
On looking this up on the internet I found comments that the acid had oxidised, I am not sure if this is the case or not. Would this change in color, other than needing more to do the same job, cause any other issues such as staining? I think not but I just wanted to be sure.
The second question concerns my friend's pool who keeps his pool at about 8 ppm Chlorine (to avoid Mustard algae), 32 to 35 CyA, 575 ppm Ca, 70 ppm Alk, salt at at 3200 ppm, and a pH of 7.4 ppm. The question is that the phosphate reading is 3500 ppm approximately, if I remember reading somewhere on the net correctly (and I am probably wrong) that high chlorine readings can lead to false phosphate readings, yes or no? If this is so would it be better to dilute by adding 2 parts tap water to one part pool water so the chlorine reading is approximately 2.67, and then multiply the phosphate reading by three?
Any help would be appreciated.
At the hardware store I normally purchase the acid from I did notice the container was dusty, on asking the assistant manager he stated that since home construction was slow in Hawaii they have been selling less. In addition I always unscrew the cap to make sure it has never been opened and I did notice the normall shiny stainless steel caping over the clear plastic cap looked mottled. Next time I will be more picky. I normally feed acid automatically but the pump is broken and the new one has yet to be installed.
On looking this up on the internet I found comments that the acid had oxidised, I am not sure if this is the case or not. Would this change in color, other than needing more to do the same job, cause any other issues such as staining? I think not but I just wanted to be sure.
The second question concerns my friend's pool who keeps his pool at about 8 ppm Chlorine (to avoid Mustard algae), 32 to 35 CyA, 575 ppm Ca, 70 ppm Alk, salt at at 3200 ppm, and a pH of 7.4 ppm. The question is that the phosphate reading is 3500 ppm approximately, if I remember reading somewhere on the net correctly (and I am probably wrong) that high chlorine readings can lead to false phosphate readings, yes or no? If this is so would it be better to dilute by adding 2 parts tap water to one part pool water so the chlorine reading is approximately 2.67, and then multiply the phosphate reading by three?
Any help would be appreciated.
