ok i tested this morning PH 7.8 FC 1.6 i added another 1000ml of chlorine trying to get up to at least 2ppm to 3ppm max......
did my first CYA test when looking down at the black dot i had the tube filled to the rim, last number on tube is 30 so going past this number to rim i assume is around 20 ? bit of guess work i wonder why there is no 20 mark,
anyway even with water to top of rim i could still see black dot, faint but i could see it, is it totally supposed to disappear to get the accurate reading, or is faint what we usually go to or expect to see ?
did my first CYA test when looking down at the black dot i had the tube filled to the rim, last number on tube is 30 so going past this number to rim i assume is around 20 ? bit of guess work i wonder why there is no 20 mark,
anyway even with water to top of rim i could still see black dot, faint but i could see it, is it totally supposed to disappear to get the accurate reading, or is faint what we usually go to or expect to see ?