Saltwater Pools
Saltwater swimming pools are becoming more common among swimming pool enthusiasts. They come with several benefits, from lower maintenance and chemical costs to a more enjoyable swimming experience. Transforming a conventional pool into a saltwater pool is a straightforward process that can yield significant benefits.
Saltwater swimming pools are becoming more common among swimming pool enthusiasts. They come with several benefits, from lower maintenance and chemical costs to a more enjoyable swimming experience. Transforming a conventional pool into a saltwater pool is a straightforward process that can yield significant benefits.
- Cyanuric Acid (CYA) - The Double-Edged Sword: CYA is essential; it acts as a sunscreen for your chlorine, protecting it from being destroyed by UV rays. But I've seen countless pools with CYA levels exceeding 100 ppm. At this level, the CYA binds so much free chlorine that the SWG must run at 100% output just to maintain a minimal sanitation level. This constant high-demand state is like redlining your car's engine 24/7. My rule is to maintain CYA in a tight band of 50-70 ppm for optimal protection without crippling chlorine efficacy.
- Calcium Hardness - The Silent Killer: This is, in my experience, the number one cause of premature cell death. High calcium, combined with the naturally high pH environment created during electrolysis at the cell plates, results in calcium carbonate scaling. These white, crusty deposits insulate the plates, severely reducing chlorine production and causing the cell to overheat. While modern cells have self-cleaning reverse polarity cycles, they cannot keep up if the Calcium Hardness is above 400 ppm. I've had to acid-wash brand-new cells simply because this was ignored at startup.
- Phosphates - The Unseen Algae Fuel: Phosphates are the ultimate chlorine demand accelerator. They are introduced into the pool from organic debris, certain cheap chemicals, and even municipal water. Algae feed on phosphates. Even if you can't see algae, a high phosphate level (above 200 ppb) will create a massive, unseen chlorine demand. Your SWG will work tirelessly to produce chlorine, only for it to be instantly consumed fighting off microscopic algae blooms. I identified this on a project where the client swore their pool was clean, yet the SWG couldn't keep up. A simple phosphate test and subsequent removal solved the problem overnight.
- Test Free Chlorine (FC) and pH with a reliable drop kit, not strips.
- Adjust the SWG output percentage up or down by 5-10% increments to target an FC level of 2-4 ppm. Avoid drastic changes.
- Visually inspect the cell for any early signs of scale buildup.
- Empty skimmer and pump baskets to reduce the introduction of phosphates.
- Test Total Alkalinity (TA). This is your pH buffer. I aim for 80-100 ppm to prevent pH from swinging wildly.
- Test Calcium Hardness. This is your primary preventative maintenance task. Keep it in the 200-350 ppm range.
- Test CYA. Ensure it's within the 50-70 ppm operational window.
- Test Salinity (PPM) with a separate, calibrated digital meter to verify the SWG's internal sensor is accurate.
- Perform a phosphate test. If levels are creeping up, treat with a phosphate remover before it becomes a chlorine-demand issue.