Confused about FC test

[smforte]

I merged the similar posts as well. jblizzle

Moved post. Please start your own thread when you have a question Butterfly


Post here since I'm still somewhat of a newbie. New test kit for me too. I'm confused about the FC TEST. I tested at 25 mm. I'm not sure what number I'm suppose to use to multiply by.

FC ?
CC 0
pH 7.4
TA 100
Ch 160
CYA 60. I know this is a tad high. Was using those bad ole tabs during the winter. It was 126 before replacing some water and slamming etc

 

[smforte]

I'm still somewhat of a newbie. New test kit for me too. I'm confused about the FC TEST. I tested at 25 mm. I'm not sure what number I'm suppose to use to multiply by. It says 1 drop = 0.2. 1 drop = 0.5 which is confusing.

FC ?
CC 0
pH 7.4
TA 100
Ch 160
CYA 60. I know this is a tad high. Was using those bad ole tabs during the winter. It was 126 before replacing some water and slamming etc

 

[Richard320]

With a 25 ml sample, multiply by 0.2.
With a 10 ml sample, multiply by 0.5

The 10 ml sample is accurate enough for day-to day use, and saves on reagent.

 

[Butterfly]

Re: Test results - confused on FC test

Here's a quote from the Extended Test Kit Directions

There isn't normally any reason to do this, but if you need more precision you can do this test with a 25 ml sample of pool water and multiply the number of drops by 0.2. In most situations the added precision is useless and simply wastes reagent.

Here's a link http://www.troublefreepool.com/threads/24188-Extended-Test-Kit-Directions

 

[Isaac-1]

I will go beyond what Richard said, and say the 10 ml .5 FC per drop is all you will ever need, there is no need to test to higher accuracy than this when dealing with a residential pool which is using CYA stabilizer as you could have variation close to this from one sample to another depending on what part of the pool they come from and how good your circulation is.

Ike

 

[smforte]

Good to know cause I've been going thru some reagents...gotta order more already Thanks loads

 

[smforte]

So, my FC is 14.8. After slamming, week and a half ago then sunny days it was 43 5 days ago, 19 yesterday and it rained all night last night.

 

[jblizzle]

A FC of 43ppm is way too high, how did you overshoot so far?

 

[smforte]

Before I got my test kit, 3 wks ago, water was green, took a sample to the local yokels....my cya was 126, TA 0 ch 60 ph 6.29 FC 1.0. They had me add 25 lb ALK, 25 lbs cal, 12 cups ph up, algicide 2000 then shock each night 6 cups chlorine each night for 5 nights. After brushing and vacuuming none stop, pool looks great but I think they really overshot everything. It is now BBB for me.

 

[Patrick_B]

Yikes! Good for you taking this on yourself. It will be the best thing you ever do for your pool. Do spend some time in Pool School. The ABC's is a good place to get started. Right now is a good time to replenish your kit, as TF Testkits has a reagent sale running.

 

[smforte]

I've been reading pool school for over a year. I think I've also read every post in the forum. It's very overwhelming but some is starting to sink in. You all are all so **** smart! Trouble is most of it is over my head. I'm determined though!

 

[Patrick_B]

Focus first on Chlorine and pH. These are the two most critical parameters that need frequent attention. Do you have a specific question about either?

 

[smforte]

I think I'm good...chlorine level is based on cya level. I'll use the pool calculator since I'm anxious as to how much to add when it's time.

 

[Patrick_B]

Pool math will answer that. Just take your time entering the correct data and it will take care of you.