FC test for target 10ppm

[sungirl]

Is there a way to modify the drop test in the little blue box for a daily test running a target of 10-12 ppm FC? I've seen some suggestions on other tests of halving the water, etc to manipulate the chemical equation to test at higher levels. I hate to have to use the powder and drops every day.

TF 100 kit
CYA 100
pH 7.2
TA 80
Current FC 12

 

[mknauss]

No. Use the FAS-DPD whenever you test FC.

 

[pabeader]

You do know that you can do the powder and drops with 10ml pool water, right? Each drop is 0.5 if you do that.

 

[LFrankow]

If you are cheap like me you can use the 5 ml test, 1 drop = 1 FC, of course your error % jumps as well.

 

[PAGirl]

Have you thought about lowering your CYA so that you'll use a lower rarget, thereby saving drops? I believe many use 60 for their CYA in Texas.

 

[sungirl]

Have you thought about lowering your CYA so that you'll use a lower target, thereby saving drops? I believe many use 60 for their CYA in Texas.

It's not worth lowering it right now. It's a small, AG pool we'll take down anyway. I definitely won't run it that high next year; I just got it WAY too high before I found this site and got the good test kit. Still, it wouldn't register on the little box kit. Maybe I'll email the supplier and ask/suggest that they make a daily test kit for SWG pools since most will run over 5%.

 

[domct203]

......Maybe I'll email the supplier and ask/suggest that they make a daily test kit for SWG pools since most will run over 5%.

Good luck, just remember that 90% of the pool industry doesn't acknowledge the FC/CYA relationship. They will most likely respond that 'normal' FC levels are well within the testing results.

Nothing wrong with using the FAS DPD test daily, I do.

 

[mikefamig]

Good luck, just remember that 90% of the pool industry doesn't acknowledge the FC/CYA relationship. They will most likely respond that 'normal' FC levels are well within the testing results.

Nothing wrong with using the FAS DPD test daily, I do.

Doesn't it bother anyone here other than me that 90% of the pool industry doesn't acknowledge the FC/CYA relationship?

Mike.

 

[LFrankow]

Doesn't it bother anyone here other than me that 90% of the pool industry doesn't acknowledge the FC/CYA relationship?

Mike.

I think most of what the pool industry says is restricted by gov't regulations which for the most part doesn't allow cya in public pools. Someone posted a bit ago about a few southern states amending their pool legislation.
We can lobby gov'ts, I prefer talking people into converting to the TFP way. It is a bit slower, but we can and will sanitize the nation one pool at a time.

 

[sungirl]

I had no idea the FC/CYA wasn't common knowledge among pool people. I am I got lucky finding this site right away. I guess that's why some of my friends' pools can turn green over a weekend if we get a good rain. I've checked on a friend's pool for over a week and all she told me to do was the little blue test kit and add chlorine pucks. No telling what her pool chemistry is.

 

[mikefamig]

I had no idea the FC/CYA wasn't common knowledge among pool people. I am I got lucky finding this site right away. I guess that's why some of my friends' pools can turn green over a weekend if we get a good rain. I've checked on a friend's pool for over a week and all she told me to do was the little blue test kit and add chlorine pucks. No telling what her pool chemistry is.

Every chlorine product that I have seen in my twenty years keeping a pool has the same warning not to allow swimmers to enter the pool until the chlorine level is between 1 - 3 ppm.

Mike.

EDIT - I suspect that the 1 - 3 ppm rule assumes zero stabilizer to be safe but I'd feel better to get that confirmed.

 

[jblizzle]

Correct the standard 1-3ppm FC is assuming 0 CYA.

To the OP. Take note of the deep yellow color of the OTO chlorine test and just make sure it stays that deep yellow. But, if you habe a SWG, why are you keeping the FC so high? You should only need to maintain the FC at 7-8ppm.

 

[sungirl]

It's so high b/c it's an AG pool with a CYA near 100. I hadn't found this site yet and figured the pool wasn't holding chlorine b/c it didn't have enough stabilizer. I didn't know it was the stabilizer letting the algae grow and eat what chlorine was there. I did a partial drain and refill, but don't really want to do it again b/c the pool will come down in the fall (and I'm a little in the dog house with my husband for screwing it up so badly in the first place.) I'll know better next year.

 

[jblizzle]

If you have completed the SLAM process and passed the 3 criteria to stop, then just maintain the normal SWG FC level for your CYA.