Forum: Dealing with Alkalinity and Calcium

I thought I read somewhere that if you have a heater you should have a calcium reading of at least 200 in a vinyl pool and more in a...

Is it okay to keep the alk in a vinyl liner at 130-140 if the PH has stayed consistant at 7.5?:confused:

This might help to start off knowing your water. 'Hardness' is related to calcium hardness and alkalinity. We recently moved west about 90...

I read a post that talked a bit about TA numbers that could be misleading due to high CYA making up the chunk of the TA. Is there a calculation that...

Is there a "grocery store" source for adding calcium?

To aerate when lowering alkalinity? My fill water is high alk. Tests at 320. 3 times this year I've added acid and tried to lower it. First two...

My PH keeps wanting to climb, unless I add acid about once every week or two. Don't have an SWG (wish I did!), and it has rained alot, so can't...

I was just in the pool store looking at the price of sequesterants to help me with my scale problem (Cal. 450 and rising slowly). The pool store guy...

Yesterday afternoon I noticed a very slight yellowish tint on my pool walls so brushed them down and saw a slight yellow-brown cloud go into the...

I realise that Calcium is usually present in fill water. Our fill water is about 190-200. I understand that as water evaporates and new water...

It was my understanding that bleach use would eventually cause PH to rise, but will it also increase Alk? A few weeks ago I had my Alk down to...

I am new to learning about pools and am trying to get the constant algae out of my pool. Last weak in trying to learn about my pool I found the PS...

I have an inground, vinyl liner pool (new liner last year) without a heater. I just had my water tested. Everything was OK except the TA measured...

The test printouts from two different pool stores I've used show a Total Alkalinity catergory and an Adjusted Total Alkalinity category. Sometimes...

Just read another post referring to the Wal-Mart 5-way test for hardness. The post mentioned multiplying the result by 50 to get the test result. ...

First off: 16 x 40 IG vinyl, about 6 weeks old. I seem to have a problem with PH wanting to sit around 8 or above. My TA is 90. When we first...

I am still trying to get my alkalinity down. I have an above ground pool (about 5500 gallons) 18X48. My alkalinity readings are still around 280. ...

This is a question about Calcium Hardness...Pool info: 12,000gal IG exposed-aggregate surface. Pool store test says hardness is 185ppm. My...

Ok, my PH has been creeping downward and is now low enough that I can try to lower the alk. Not sure why it's creeping downward. But, since it is...

My pool is 1 year old, pebble finish/gunite pool. PH 7.4 FC 4.5 CC 0 CYA 40-50 ALK 70 CH 250 My ALK has come down over time. In looking...

I am a newbie also. I have an above ground 24' round. We filled it up using water that goes thru our water filtration system. After testing, I...

I hope I'm being as clear about this as I can...so hear goes. This might be long. :o Something is up with my TA...I think. Last Thursday, I...

Hi guys. I'm currently draining my 15' Easy-Set "kiddie pool" (that I filled yesterday) to more perfectly level the ground underneath it. But in the...

I've been purchasing DuPont PH and Total Alkalinity decreaser with the active ingrediant of Sodium bisulfate at $7 for 4lbs. I have to add 1-2...

Initially, I think not. The day this measurement was taken I also had a pH of 8.2, and TA of 136. If it were to be trusted, the Saturation Index was...

I have been reading all the great posts here and I know SOMEone will be able to help me!! My 3 1/2 year old pool is having 'issues' and I am worried...

I had cement patio pavers installed around my pool this week. I know I should have had the pavers done before the pool was opened but that's another...

I've tested with two test kits P234 & 5-Way HTH. Why am I getting two different alkalinity results with each test? Shouldn't the results be the...