Green Baquacil Pool Water Prevention & Treatment

by Al
(Florida)

I have read your article "Green Pool Water" and appreciate the thoroughness of your advice, however we have Baquacil in our pool and would like to read an article on Baquacil Green Pool Water if you have one.


My pump is out and our water is beginning to turn green so I know I am going to have a problem when I get our filtration system rebuilt and new sand in our filter. So, I am looking to learn:

1)What I can put in our pool now to slow or kill the green algea, and/or 2) what action and chemicals do I need to use and do when I get the filter system back up and running properly?




Thanks for the question Al

Unfortunately there's really no easy way to go from a Baquacil pool and clear it up with chlorine and then go back to a Baqua pool again. You're dealing with 2 different compounds. Biquanide is a non bleach/halogenic product and the main ingredient for oxidizing is hydrogen peroxide. The issue with this is waste builds up in the pool water over time. Chlorine is sodium hypochlorite which is bleach.

You can't simply shock the pool with chlorine to kill the algae because much of it will be eaten up by the Baquacil and not go to the algae. Even on Baquacil's own website it says the pool owner will probably have an issue with algae and to use BAQUACIL Swimming Pool Sanitizer which is POLYAMINOPROPYL BIGUANIDE according to its own MSDS form.

You're going to need to keep the FC at 15ppm for a period of time until the chlorine overrides the Baquacil. At that point you'll need to shock again to kill the algae.

Also without a working filter it's virtually impossible to circulate the water in order to kill any algae or keep it from spreading even further.

Honestly, the best thing to do is when you get your filtration system up and running again is to switch to a chlorine pool. It's much easier and less expensive than Baquacil.

Concerning your 2nd question if you choose to stay with Baqua products then you need to stay with their recommendations found on their site. Add BAQUACIL Swimming Pool Sanitizer and Algistat to the pool to achieve a 50 ppm level. Add the start-up dose of BAQUACIL® Oxidizer in front of skimmer. Add the start-up dose of BAQUACIL® CDX™ Product directly into skimmer.

If you feel your situation is more complex than this, I do phone consultations for a donation of your choice. It makes things go much faster and many people have found it extremely beneficial, saving them time and money in the long run. All your questions will be answered. I have nothing to sell you so you know I'm not bias.

Pool Consultation

Hope this helps and have a great Summer.

Robert

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Pool Green Since Opening From June First Week

by Pranathi

We tried lot of chemicals to make the pool blue and then changed the sand in the filter, removed the top 6" of water to get rid of nitrates and refilled.

Added shocks, algaecide, clarifiers, first aid based on the chemical balances that were checked every day at pool store. Last wednesday all the chemicals were in correct range but still the pool was green. Saturday evening the readings were below chlorine - 0.5 PH - 7.8 TA - 88 Calcium Hardness - 200 CYA - Cyanuric Acid - 60 Phosphate - very low We bough 1 quart of super floc, added to pool on sunday at 9:30am ran the filter for 2 hours in circulation mode and shut off. Backwash yesterday evening.

It has been 34hrs till now and the pool has been worse dark green. We have 14hrs to check the condition until it is 48hrs. I am very frustrated and appreciate your advice.




Thanks for the question Pranathi

First thing you need to do is stop using clarifiers, super floc, First Aid, etc... First Aid, and I assume that's Natural Chemistry, is enzymes and a clarifier/flocc. Basically what you're doing is doubling or tripling up on the clarifier when you use FA plus another clarifier. You're wasting alot of money on chemicals that are not doing anything to clear up the pool. You need to kill the algae and the only way to do that is to keep blasting it with chlorine.

You're readings are alright. Just some simple adjustments and you should be there. First thing is to get your pH down to 7.0 - 7.2. Chlorine works better at a lower pH level. Use 20 oz. of acid per 10k gallons to reduce the pH 0.2. Broadcast around the perimeter of the pool, sweep, and FILTER. Be sure the filter is cleaned out and backwashed. Wear long sleeve shirt, pants, and safety goggles.

2 hours later shock the pool with liquid chlorine. It's 1 gallon of chlorine per 10k gallons. Shocking is a process, not an event. The trick is to get AND keep the chlorine above 10 - 12ppm for a period of time. You'll need to manually dose the pool with chlorine to keep it at 10 - 12ppm. Make the adjustment at night, then retest in the morning. Be sure to have the pump running 24/7 and backwash once per day. You can go up to 15ppm, but no higher. Anything after that and you're wasting money and chemicals.

You'll know this is working because the pool will go from green to a white/grey cloudy and the chlorine will begin to hold better. First you may lose most of the chlorine, then 2/3, then 1/2, and so on. Once you only lose 1 - 2ppm of chlorine 8 - 10 hours after the last application you know the algae is dead. Now it's just a matter of filtering and backwashing once per day. Broadcast the chlorine around the perimeter of the pool and brush well. This will loosen up any algae adhering to the walls and bottom.

Only at this stage should you even consider a clarifier. This will help with the filter catching the particles.

Here's a black/green pool that I cleared up. It took about 5 days and cost about $40 in chemicals. There were chunks of algae the size of sofa cushions floating in the pool and 4 - 5" of algae on the bottom. The pool owner didn't run the pump for about 8 months.

Part 1
https://www.youtube.com/watch?v=4vQeUwDT5eU

Part 2
https://www.youtube.com/watch?v=6b4ohxh8sDk

You should spend no more than $50 on clearing up a pool. I doubt your pool was as bad as this one.

If you feel your situation is more complex than this, I do phone consultations for a donation of your choice. It makes things go much faster and many people have found it extremely beneficial, saving them time and money in the long run. All your questions will be answered. I have nothing to sell you so you know I'm not bias.

Pool Consultation

Hope this helps and have a great Summer.

Robert

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Return to Green Pool Water.

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