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Description
PristineCheck® Pool Startup & Mineral SequestrantPristineCheck Pool Startup Water Balancer & Mineral Sequestrant Give your pool the perfect foundation before every season. PristineCheck Pool Startup by PristineBlue is a professional grade liquid mineral sequestrant that binds excess calcium and other hardness minerals in your water preventing stubborn stains, ugly scaling, and cloudy water before they start. Whether you're opening your pool for the first time this year, refilling after a drain, or
PristineCheck® Pool Startup — Water Balancer & Mineral Sequestrant
Give your pool the perfect foundation before every season. PristineCheck® Pool Startup by PristineBlue is a professional-grade liquid mineral sequestrant that binds excess calcium and other hardness minerals in your water — preventing stubborn stains, ugly scaling, and cloudy water before they start. Whether you're opening your pool for the first time this year, refilling after a drain, or battling hard source water, PristineCheck prepares your pool for a cleaner, clearer swim season.
Why Use PristineCheck?
- Sequesters excess calcium and other minerals that cause staining and scale buildup
- Prevents equipment damage and unsightly deposits on pool surfaces and fixtures
- Prepares water to get the most out of the PristineBlue chemical system
- Improves overall water clarity and boosts sanitizer effectiveness
- Works with virtually every pool system — chlorine, bromine, salt, ozone, UV, and more
- Available in 8 fl oz (spa size), 32 fl oz, and 64 fl oz bottles
Dosing & Application Instructions
Pools: Add 2 oz per 1,000 gallons of pool water. Run your filter for at least 6 hours (up to 24 hours for best results), then backwash your sand or D.E. filter — or thoroughly clean your cartridge filter — before introducing PristineBlue. Wait one full day after applying PristineCheck before adding PristineBlue to the water.
Spas & Hot Tubs: Add 10 mL per 100 gallons of spa water. Run the filter for 4–6 hours, then remove and clean your filter media before proceeding with your spa care routine.
Pro Tip: Use PristineCheck at every pool opening, after any refill, or anytime your source water tests high in calcium hardness. This single step can save you hours of troubleshooting down the road.
Spas & Hot Tubs: Add 10 mL per 100 gallons of spa water. Run the filter for 4–6 hours, then remove and clean your filter media before proceeding with your spa care routine.
Pro Tip: Use PristineCheck at every pool opening, after any refill, or anytime your source water tests high in calcium hardness. This single step can save you hours of troubleshooting down the road.
Compatible Pool Systems
- PristineBlue chemical system (specifically designed as the first step)
- Chlorine and bromine sanitizer systems
- Salt chlorine generators
- D.E., sand, and cartridge filtration
- Ozonator and UV systems
Not compatible with all systems. Do not use PristineCheck alongside metal-out or metal remover products (consult the manufacturer before combining), biguanide systems (such as Baquacil® or SoftSwim®), copper or copper/silver ionizers, or algaecides containing copper. Using incompatible products together may reduce effectiveness or damage pool equipment.
Safety Information
⚠ DANGER — Read Before Handling
PristineCheck® contains 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP) and Orthophosphoric acid, which are corrosive at concentration. This product carries a GHS signal word of DANGER (NFPA Health: 2 / Reactivity: 1).
Eye Hazard: Causes serious eye damage (GHS Category 1). Always wear chemical-splash protective eyewear when handling this product.
Skin Hazard: Causes skin irritation (GHS Category 2). Wear chemical-resistant gloves and avoid contact with skin and clothing. Wash face, hands, and any exposed skin thoroughly after handling.
Additional Precautions:
📄 Download the current Safety Data Sheet (SDS-RWS-004, issued 2023-01-10)
PristineCheck® contains 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP) and Orthophosphoric acid, which are corrosive at concentration. This product carries a GHS signal word of DANGER (NFPA Health: 2 / Reactivity: 1).
Eye Hazard: Causes serious eye damage (GHS Category 1). Always wear chemical-splash protective eyewear when handling this product.
Skin Hazard: Causes skin irritation (GHS Category 2). Wear chemical-resistant gloves and avoid contact with skin and clothing. Wash face, hands, and any exposed skin thoroughly after handling.
Additional Precautions:
- Keep out of reach of children at all times
- Do not ingest — if swallowed, seek medical attention immediately
- Do not mix with other pool chemicals — risk of violent reaction or spattering of low-pH solution
- Never pour water directly into the product container — this may cause dangerous spattering
- Store in a tightly closed container above 32°F (0°C)
📄 Download the current Safety Data Sheet (SDS-RWS-004, issued 2023-01-10)
Product Details
- Active Ingredient: HEDP (1–10%) + Orthophosphoric acid (<1%)
- Form: Clear, colorless liquid
- Container Sizes: 8 fl oz (spa), 32 fl oz, 64 fl oz
- Shelf Life: No expiration on effectiveness when stored properly
- Manufacturer: Rec. Water Solutions, LLC / Earth Science Laboratories, Inc. — Rogers, AR
Helpful Resources:
PristineBlue Pool Start-Up Instructions | PristineBlue Water Care Program (PDF) | Full Safety Data Index
PristineBlue Pool Start-Up Instructions | PristineBlue Water Care Program (PDF) | Full Safety Data Index
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 5
Best pillow ever!
Size: King (2 Pack)
I love this pillow. I like a softer pillow and my partner prefers a firmer pillow. With these pillows you can adjust it to the comfort level you desire. For mine I took out quite a bit of the shredded memory foam (I call it fluff). I took out one 13 gallon trash bag of the fluff. After I slept on my pillow for a couple of weeks I found it was getting to soft so I took my saved bag of fluff and added it into the pillow. Now it's PERFECT! The cooling side works great. When you lay your head down on it you can feel the cool pillow. Helps falling a sleep easier. I would highly recommend this pillow!
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Great Pillows for a Good Night’s Sleep
Size: Queen (2 pack), Size: Queen (2 pack)
These pillows are very comfortable and supportive. They keep their shape well and provide great neck and head support throughout the night. The material feels soft and high quality, and they helped improve my sleep. I wake up without neck pain and feel well rested. Definitely worth it.
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Reviewed in the United States on January 25, 2026
★★★★★ 5
Great quality for the price
Size: Queen (2 pack)
Wow! For the cost...these pillows are amazing! Comfortable, soft, supportive, and adjustable to your specific needs. Highly recommend, I would buy them again! 10/10
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Reviewed in the United States on May 22, 2026
★★★★★ 5
BEST PILLOW EVER! - But you must follow these instructions
Size: Queen (2 pack)
This is literally the BEST pillow I've ever slept on! It is SO COMFORTABLE, and I can't believe it was $40 for TWO PILLOWS! I slept on a similar, much more expensive name-brand pillow at my friend's house and thought, "I just HAVE to have this pillow!" When I found this one on Amazon for just $20 a pillow, I was so stoked! However, I was turned off by the "paint-like smell" when I slept on it right out of the box the first night. (I was too impatient to try it out!) Do NOT buy this pillow if you're in a hurry, because to get the paint smell to go away, you MUST follow these instructions: 1. Take the pillow out of its case and wash the case. 2. Leave the case off for TWO WEEKS (yes, you heard right!) to let the pillow out-gas. After waiting for two weeks, the smell will be GONE! Yes, I know it's a long time to wait, but it's WORTH IT! As far as the firmness of the pillow is concerned, I took about five big handfuls of the stuffing out and put it in a ZipLoc bag, but my husband liked the pillow as-is. I personally didn't want it so stuffed and wanted a bit "softer" feeling. I also sleep on my stomach sometimes, so taking out five handfuls of stuffing was perfect. I LOVE MY NEW PILLOW! (One thing I wish, however, is that the pillow came in a standard size. My husband and I have queen-size pillow cases, but our kids have standard-size pillow cases. Darn! I want THEM to have a chance to have such a comfy and inexpensive pillow too!)
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Reviewed in the United States on February 10, 2026
★★★★★ 4
The cold side really works. It's nice ;)
Size: King (2 Pack)
The soft side aspect of it is really awesome. We like the whole cold pillow thing but personally I feel like it keeps my head too high up so I wake up with a neck pain. But for someone who likes support, this would be a perfect option.
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Reviewed in the United States on March 14, 2026