How to convert during shortage?

fishwater

Well-known member
Jun 19, 2015
60
Rochester/NH
We bought a house with a Baquacil pool this year & now that it’s finally clear, it had two inches of rotted leaves on the bottom when we opened it up. With a chlorine shortage how do I move forward with the conversion? The pool store has granular chlorine available but no liquid locally. I’m converting to chlorine so I can then install my Edge 40 SW, what’s my best plan moving forward?
 

JoyfulNoise

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May 23, 2015
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Tucson, AZ
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My personal suggestion, feel free to ignore it, is that I would drain 3/4 of the pool, refill, then convert. Any CDX product is going to cause horrible chlorine demand and will drag the conversion out for a long time. We’ve seen it time and time again. I realize draining a pool and refilling seems like a waste but you’ll spend weeks babysitting that pool during a conversion. Drain, refill and convert will make it go a lot faster.

Just my 2¢ …
 
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Leebo

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Jul 21, 2011
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It’s a toss here;
If you drain and add fresh water the process will go much quicker as you’re only going to need to convert the little Baqua that’s left over after the drain. This will mean the amount of liquid chlorine you’ll need is greatly reduced. That said, seeing you’re on the East coast there’s a large possibility that your Baqua level is already low after a long winter thus the need to drain isn’t as vital compared to some pools. Regardless, the best bet here is fresh water, the question remaining is has the fresh water already been added over the winter or do you still need to add it.
 

fishwater

Well-known member
Jun 19, 2015
60
Rochester/NH
My original intent was to drain as much as possible but we have an extremely high water table here & one of the pool walls is caved in from a frost heave so I don't want to lower the level much below the skimmer so to prevent any possible issues.
 

JoyfulNoise

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May 23, 2015
18,612
Tucson, AZ
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DO realize that if you go with an SWG you'll want to consider upgrading your pump either to a variable speed pump OR convert the pump motor to a 2-speed that is large enough to run the SWG on LOW speed. SWG's add chlorine very slowly and so you'll be running that single-speed pump upwards of 8-10 hours or more per day to produce enough chlorine. That's going to drive up your utility bill. VSP's or 2-speed pumps on low use considerably less energy.
 

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JoyfulNoise

TFP Expert
Platinum Supporter
May 23, 2015
18,612
Tucson, AZ
Pool Size
16000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
My original intent was to drain as much as possible but we have an extremely high water table here & one of the pool walls is caved in from a frost heave so I don't want to lower the level much below the skimmer so to prevent any possible issues.

The wall should be fixed as soon as you can afford to do so ... does your homeowners insurance cover the pool? A structurally compromised pool wall is not safe.
 

fishwater

Well-known member
Jun 19, 2015
60
Rochester/NH
The wall should be fixed as soon as you can afford to do so ... does your homeowners insurance cover the pool? A structurally compromised pool wall is not safe.
The local pool company inspected it & it looks like it's been that way for sometime so without digging they advised that we keep an eye on it, the joys of new home ownership.

Moving forward though the goal is to get from Baquacil to chlorine & then to salt so I'll need to fight it without draining water more than I've been doing with vacuuming to waste & back flushing.
 

fishwater

Well-known member
Jun 19, 2015
60
Rochester/NH
So I decided to just go for it on Saturday, started with 4 bags of shock (no cya) from the local pool store while I drove all over town sourcing liquid chlorine. The water turned a pretty shade of green with foam that I tried to skim off while running the filter, I didn’t see a mention of keeping it in recirculate when reading the original article. After a few backwashes it was running clear. Started Sunday morning at 7.2 ph & 0 FC with a pretty clear pool, just a slight tint of green so I started dumping 10% LC yesterday & monitoring levels. Used 11 gallons of 10% yesterday then brought it back up to 15 FC before bed. Woke up this morning to 15 FC & 7.5 PH but the pool looks clear, looks better than before I started. I’ve been running Fred the robot & brushing constantly, I can still see white goo on the bottom & in Fred’s basket but I think it’s coming right along, looking good!

I think it’s been beneficial that I’ve been vacuuming, backwashing & refilling as levels drop for the last three weeks as I fought the 2 inches of rotted leaves on the floor of the pool. The local store tested when I first opened the pool & came up with 30ppm of sanitizer so it looks like the long winter/spring helped kill some of the Baquacil prior to starting the conversion.
 

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Matt_PEBKAC_Oh

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May 29, 2018
152
Bluffton, Ohio
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I just went through the whole process. I had stopped adding chemicals last August. I may have had some CDX in there but no way of testing. My baquacil content was about 16-20ppm. It took 13-15 days, adding enough 12.5% to keep up to 15ppm. I believe I went through 25 gallons (yep, your eyes aren't deceiving you) in my 13,700-13,800 gallon pool. Somewhere on here is my 7 page posting. Just bought 10 50lb bags (got the 11th for free!!!). I need to start dumping salt and get the generator installed.
 
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JoyfulNoise

TFP Expert
Platinum Supporter
May 23, 2015
18,612
Tucson, AZ
Pool Size
16000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
I just went through the whole process. I had stopped adding chemicals last August. I may have had some CDX in there but no way of testing. My baquacil content was about 16-20ppm. It took 13-15 days, adding enough 12.5% to keep up to 15ppm. I believe I went through 25 gallons (yep, your eyes aren't deceiving you) in my 13,700-13,800 gallon pool. Somewhere on here is my 7 page posting. Just bought 10 50lb bags (got the 11th for free!!!). I need to start dumping salt and get the generator installed.

Just be aware that adding a lot of salt to a pool all at once requires a lot of brushing to mix it up. If the salt is simple softener salt, then you'll want to add in batches and be ready to vacuum up any dirt that might come along with it to avoid staining. Pool grade salt typically is finer grain (like table salt) and will dissolve more rapidly. In all cases, you're going to need to wait 24-48 hours to allow for mixing ... salt water is more dense than the pool water it develops in and so it can take a lot of time to fully homogenize the water. We have had people add salt and then try to turn on their SWG only to get random low and high high salt warnings until the water has had time to fully mix. Using a robot cleaner our throwing kids in the pool can greatly help to mix the water up.
 
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Deb04

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Jul 12, 2008
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Seacoast, NH
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I’m in your area. If you’re still sourcing liquid chlorine, there are Ocean States in Newington (across from BJs) and in Stratham. There are others on the Seacoast too, but those are “my” stores.
 
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fishwater

Well-known member
Jun 19, 2015
60
Rochester/NH
I’m in your area. If you’re still sourcing liquid chlorine, there are Ocean States in Newington (across from BJs) and in Stratham. There are others on the Seacoast too, but those are “my” stores.
Ocean State has been a total win for us, I didn’t even know that we had a store in town. I was just there yesterday to grab more LC & they had a fresh shipment in stock. I have 40 gallons in my stash at this point which should get me through the rest of the conversion & keep me going until I have time to install the SWG.
 

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