mark46143 said:
That is the focus yes. If your SWG has been on during these OCLT tests they are void.
Low chlorine/No free chlorine
- Thread starter mark46143
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That is the focus yes. If your SWG has been on during these OCLT tests they are void.
yes.....draining only to lower CYA. Remember that CYA doesn't get consumed. Once it is added, it stays (except for rare set of circumstances). Once you reach your target CYA....leave it alone. And by "leave it alone" that means be mindful of not using the chlorine products that also contain CYA (as I think you found out). Stick with bleach and hopefully be able to get back to just SWG to maintain CL levels once SLAM process is complete.
Q for you: since I am running low on the 0871 FAS/DPD is there anyway to get an accurate reading by using 0870/0871 with 5 ML of water and multiplying by 2? If so would I cut the 0870 powder in 1/2 as well?
You will reduce the accuracy, so it is no good for the OCLT when the drop is close to 1ppm, but you can use a 5 ml sample, then each drop of the R-0871 is 1 ppm. The amount of R-0870 can be a level scoop at that volume.
This seems to come up every few days. 5ml of water would make each drop count as 1ppm ... this is ok if you are just working at maintaining high FC for the SLAM process, but not enough accuracy to verify if you have finished the SLAM process.
You may be able to get away with only 1 scoop of powder instead to 2 ... just be sure you start with a good deep pink color and you "should" be fine.
I assume you have already ordered refills???
You may be able to get away with only 1 scoop of powder instead to 2 ... just be sure you start with a good deep pink color and you "should" be fine.
I assume you have already ordered refills???
Yes, refills should be here tomorrow. I was just trying to make sure the FC was still ok.
Thanks
Thanks
Too much powder does not matter. Too little can cause issues.
The amount of powder you need depends on how high the FC level is and how much in your water sample.
The amount of powder you need depends on how high the FC level is and how much in your water sample.
Jeetyet
0
I recall reading somewhere on here that as long as you have a few un-dissolved granules at the bottom of the tube you've added enough powder. I can't vouch for the accuracy of that statement but I know I've seen it somewhere. YMMV
That's not true. Whether you have undissolved granules is irrelevant. That's just a side effect of having some clumped granules. If they were fresh or ground well they would fully dissolve. You want to add enough powder so that the color transition at the end from pink/red to clear is distinct. Usually one level one scoop is enough for a 10 ml sample and two for a 25 ml sample. If you see a flash of pink that turns clear when you add the powder, then the FC is high so add more powder to get a color. If you add powder and the color is faint but you know you've got chlorine in the water, you can add more and it won't hurt.
If there is too little powder, then the color can be too weak so when you get to the end you'll stop too short in the test so measure artificially too low.
If there is too little powder, then the color can be too weak so when you get to the end you'll stop too short in the test so measure artificially too low.
Jeetyet
0
Thanks for the clarification chem geek. Will now move that little tidbit of mis-info to file 13. 
Well that's a move in the right direction. Don't do another CYA until you have another significant water change. 70 is way better than 100+ 
Agreed. You shouldn't need to test CYA for a while UNLESS you were to had a stabilized chlorine product instead of bleach which we know you won't do again :lol:
Your on your way to a much more troublefree pool. With the SWG you'll be surprised how easy it is to maintain now that you are understanding your CYA/free chorine relationship. I promise.
Your on your way to a much more troublefree pool. With the SWG you'll be surprised how easy it is to maintain now that you are understanding your CYA/free chorine relationship. I promise.
Looking good Mark, that is what you want. See if you can do it again tonight. How is the water looking in clarity terms?
Good deal, you ought to be good to go. I'd do one more OCLT, and after that do NOT let the FC fall below target. Work on getting the CYA down as you can to save some bleach.
I thought I would mention just in case: your swg should be off when doing the OCLT.
linen said:
Indeed!
(I made mention of this above)
Mark you did turn it off didn't you?