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I read that you should subtract 1/2 of your CYA measured value from your measured alkalinity. The resulting number is your effective alkalinity value. Is this true? If so does the TFP alkalinity range take this into account?

what "trade" means (unchangeable field after the user entered % in Poolmath's FC sect Hi, Am unclear on what's the right way to enter chemical info for FC. I buy 10% chlorine from Home Depot (as shown on the jug label). Should I enter "10" in the fill form of Pool Math? I am confused what...

Hi, Am unclear on what's the right way to enter chemical info for FC. I buy 10% chlorine from Home Depot (as shown on the jug label). Should I enter "10" in the fill form of Pool Math? I am confused what "trade" means (unchangeable field after the user entered %.). PS I selected the 128 oz...

Login problem. Read a few posts. Will wait for a while before using.

Thanks.

My pH always seems to go to 7.8 and stay there. I add acid and it temporarily goes to 7.2/7.3 but moves back to 7.8. Not too worried about it hanging around 7.7/7.8. Anyone have similar situation and remedies?

Don't know if this was seen since website problems.

I hired a neighbor's pool service for my pool while I was out of town for 3 weeks. When I tested the pool when I returned there were some readings which are outside the range recommended here (in parenthesis). Should I take any action to change these readings? pH (7.5-7.8) 7.5 TA (70-90+) 50...

I'll make that my goal.

It is.

I have a 6 month old shotcrete pool and have been doing all my own maintenance after the PB initial startup. Water has stayed clear and no problems to report. The water here in Scottsdale is pretty hard (250-300ppm). Latest test results: FC - 5 is target TA - 100-110 CH - 400 CYA - 35 pH -...

The Baja step entry acts as a wet deck area. The decking amount is perfect for us. You can sit on the one side & exit the pool easily plus we have 2 sitting ledges at two corners. We additionally have two sitting areas: one is a covered patio & the second a raised patio with a sail shade. We...

Total agreement.

Can't give an opinion yet on depth yet. Pool finished late in the season but so far we like it. Don't understand your decking question exactly. Please rephrase your question/concern.

I'm just looking for a system for 2 to 3 weeks coverage while I might be traveling. It looks like the Stenner solution might work for this rather than ask my neighbor (or hire a pool service) to dump X ounces of chlorine every third day in the pool. I'm a little concerned about the temperature...

Is there any residential ways to add bleach or chlorine like you do with acid via the Pentair IntelliChem box. I looked at some posts in the website but they are all a few years old and doesn't look like there's anybody that makes such an item. There are some solutions and put tablets but I'm...

Thanks for your post. Did you consider installing either the pentair IntelliChem or IntellipH systems? What power unit did you use with the IC40 unit? Do you use an easytouch system?

I am looking to add a salt chlorine generator to our pool. Have been doing the maintenance for the last 6 months and everything is fine but I have a few extended trips coming up and will add this bit of automation. I have read the threads here about the Pentair system. Am currently getting some...

There is nothing unique. Their purpose is to clean the bottom & remove the debris via the drain. This generation does it so well that brushing the bottom is redundant. Still brush the sides.

The system is working very well. Pool stays clean without any brushing. I brush every few days mainly out of a guilt-trip

A little late but here's some finished pics

Ditto.

I have some water features in my pool. If these are running for a few hours, will the pH rise up? Found some articles written by Lowry which reinforces many of the ideas here.

Thanks.

My TA measures between 110 and 120. When the pool is being used much, the PH might sometimes raises 0.1 between daily testing. Do I need to do anything to attempt to lower TA? I'm tending to not do anything but am unsure. If I need to lower TA, what is the best way to add the acid to lower the...

Thanks. Didn't see the CSI factor and was paying attention to the items I listed.

Sorry but I don't know what CSI is and could only find a couple of reference to something called Calcite Saturation Index. It looks like having a stable pH of 7.7 and a TA of 110 is okay. Am I understanding correctly? Here's my stats from latest sample: FCL 3.7 TCL 3.7 TA 110-120 PH 7.7 CH...

The Recommended Levels for TA says TA 70-90+ for plaster with Bleach. The card included with my TF-100 kit say 100-120 for manually chlorinated pools. My TA measures 110-120 ppm. Don't know why there is a difference in the recommended targets. Do I have any reason to do anything?

Do you mean "bring it up to 200"? As I read it, the suggested range is 250-350. Will test the tap water but know that it is "hard" tap water.

Repeat from above: I live in a hard water area and am confused why my CH is low. Should I add calcium chloride now or be patient?