I don't seem to be losing FC at a normal pace. Here in tucson the water's up to 60 degrees, I chlorinate with 10% liquid chlorine. I had a horrifying CYA level of 150, I managed to the get that down to 55 with a partial water change.
However, despite the CYA being at a good level for here in AZ, my FC just doesn't seem to be changing much. I chlorinated on the 14th of February and brought the FC level up to 11, now on the 22nd, 8 days later, the FC has only dropped down to 9.5. The pool gets full-on sun all day so I really would've thought it would go down a lot more than that. Is FC loss dictated THAT much by temperature? I'm sure it's less in cold weather, but it's only 15-20 degrees lower than it will be in the summer.
2nd question: With the taylor FAS-DPD test, or any titrating test for that matter, how important is it to swirl after each drop? Like, if you know the FC level is above say, 5, and you're doing the 10ml .5 per drop test, if you drop in like 5 at a time before swirling, is that going to completely wreck the test? I'm just thinking of reasons why I don't seem to be seeing a FC loss like I should be.