Hi, and thanks for the advice in advance. I'm a new member but have been visiting this site for years now. I have a TF-100 test kit and test like a maniac. My chlorine readings are always higher than what the pool store comes up with. Let's take today for example, I checked my chlorine and came up with 4.5. I go to the pool store and they come up with a FC of 2. I checked it again when I got home and came up with the same, 4.5. Whether I use the OT method or the FAS/DPD I come up with the same readings. This has happened on numerous occasions. I watch them test the water and they do not use strips, rather drops and visuals and seem to do a thorough competent job. And with that being said, as the summer progresses and I keep the water balanced with a FC of 3-5 I start getting algae (what I believe is mustard algae). This leads me to beleive that they are likely right and I'm wrong. I mean, shouldn't the chlorine test be one of the easiest? All the other test come up the same. My question is,what could I possibly be doing wrong consistently? I know I still have work to do but these are my current levels. Once again, thanks.
Temp : 74
Salt : 3500
TC : 4.5
FC : 4.5 (pool store 2)
CC : 0
PH : 7.4
Ch : 150
TA : 50
CYA : 60
Temp : 74
Salt : 3500
TC : 4.5
FC : 4.5 (pool store 2)
CC : 0
PH : 7.4
Ch : 150
TA : 50
CYA : 60