PoolRx+ Spa Unit Purple/White 400-1K gal 331055
PoolRX
SKU: 331055
PoolRx+ Purple/White Mineral Algaecide Spa Unit with Silver – 400 to 1,000 Gallons | 331055
The PoolRx+ 331055 Purple/White Mineral Algaecide Spa Unit provides long-lasting algae control for spas and hot tubs containing 400 to 1,000 gallons of water. Featuring an advanced three-mineral formula with copper, silver, and zinc, PoolRx+ helps eliminate and prevent algae while reducing chlorine demand and simplifying routine spa maintenance.
Designed for easy installation, the PoolRx+ spa unit contains a specially treated alloy cylinder filled with a proprietary mineral formulation. As the minerals dissolve and circulate throughout the spa water, they establish a residual that helps control algae and supports more efficient chlorine performance.
PoolRx+ provides algae protection for up to six months, depending on water conditions, filtration, bather load, and water replacement. The spa unit should be replaced whenever the spa is drained and refilled or according to manufacturer directions.
Product Features
- 400–1,000 Gallon Capacity: Specifically formulated for compatible residential spas and hot tubs.
- Up to 6 Months of Algae Control: Provides long-lasting mineral protection under appropriate operating conditions.
- Three-Mineral Formula: Combines copper, silver, and zinc for effective algae control.
- Helps Reduce Chlorine Demand: Supports effective sanitation with reduced chlorine consumption when maintained according to product directions.
- Easy Installation: Designed for placement in the spa skimmer, filter area, or other manufacturer-approved location.
- Continuous Mineral Protection: Minerals circulate through the spa water and are replenished through the PoolRx+ cylinder.
- Simplifies Spa Maintenance: Helps reduce algae-related cleaning and specialty chemical requirements.
- EPA Registered: Registered mineral-based algaecide.
- NSF Certified: Certified to NSF/ANSI/CAN 50.
Product Specifications
- Manufacturer: PoolRx
- Manufacturer Part Number: 331055
- Distributor Part Number: PRX-50-1055
- Product Series: PoolRx+
- Product Type: Mineral Spa Algaecide Unit
- Color: Purple/White
- Spa Capacity: 400–1,000 Gallons
- Active Minerals: Copper, Silver, and Zinc
- Protection Duration: Up to 6 Months
- Application: Residential Spas and Hot Tubs
- EPA Registration Number: 79817-4
- Certification: NSF/ANSI/CAN 50
- UPC: 700553310556
- Quantity: 1 Mineral Algaecide Unit
Mineral Formula
The PoolRx+ mineral formulation contains the following registered active ingredients:
- Copper Sulfate Pentahydrate: 86.85%
- Zinc Sulfate Monohydrate: 1.51%
- Silver Nitrate: 0.40%
- Other Ingredients: 11.24%
How PoolRx+ Works
PoolRx+ uses a specially treated alloy cylinder containing mineral granules. When introduced into spa water, the granules dissolve and distribute the active minerals throughout the water during normal circulation.
The minerals help eliminate and prevent algae while allowing chlorine to work more efficiently. As water passes through the cylinder during filtration, the minerals are rejuvenated to help maintain residual protection.
PoolRx+ works alongside an appropriate chlorine residual and does not replace the need for maintaining sanitizer levels or balanced spa water.
PoolRx+ Spa Installation Instructions
- Verify that the spa or hot tub contains between 400 and 1,000 gallons of water.
- Clean the spa filter before installation.
- Test the water for metals such as copper and iron and follow PoolRx instructions if levels exceed 0.2 ppm.
- Verify that the pH is between 7.2 and 7.8 and the chlorine level is below 10 ppm before installing.
- Place the PoolRx+ spa unit into the skimmer or manufacturer-approved filter location.
- Run the spa through a complete filtration cycle to distribute the minerals throughout the water.
- Leave the PoolRx+ cylinder in place to maintain mineral protection.
- Continue testing and maintaining water chemistry according to the product label and applicable spa sanitation requirements.
Spa Water Maintenance
After installation, maintain clean filtration equipment and balanced spa water. The manufacturer recommends a pH range of 7.2–7.8 and provides specific chlorine maintenance directions for PoolRx+ treated water. Follow the registered product label and applicable local requirements for sanitizer concentrations.
Replace the mineral unit after draining and refilling the spa, or when the manufacturer's recommended treatment interval has elapsed. Heavy bather loads, water loss, and water replacement may shorten the effective treatment period.
Compatible Spa Systems
- Residential hot tubs containing 400–1,000 gallons
- Inground spas within the specified gallon capacity
- Chlorine-sanitized spa systems
- Compatible cartridge filtration systems
- Compatible sand and D.E. filtration systems
Compatibility: PoolRx+ is not intended for bromine- or biguanide-based sanitation systems. Always verify spa capacity and the sanitizer system before use.
Related PoolRx+ Mineral Algaecide Products
Aqua Pool Supply carries additional PoolRx+ mineral treatment products for swimming pools and spas of different sizes.
- PoolRx+ 331001 – Blue/White Mineral Algaecide Unit, 7,500–20,000 Gallons – Mineral algae-control system designed for larger residential swimming pools. This is a different capacity unit and should not replace the 331055 in a 400–1,000 gallon spa.
- PoolRx+ 331057 – Yellow/White Spa Mineral Algaecide Unit, 100–400 Gallons – Smaller-capacity PoolRx+ spa unit for compatible hot tubs and spas.
- PoolRx+ 334055 – Purple/White Spa Mineral Algaecide 4-Pack – Four-unit package of the Purple/White mineral algaecide for qualifying 400–1,000 gallon spas.
Additional Spa Water Maintenance Products
Explore spa water testing products to help monitor sanitizer levels, pH, and overall water balance.
Why Choose PoolRx+ for Spa Maintenance?
The PoolRx+ Purple/White unit offers a convenient mineral-based algae-control system designed for smaller bodies of water. By combining copper, silver, and zinc, the unit supports effective algae control while helping reduce the amount of supplemental chemicals required for routine spa care.
Package Includes: One (1) genuine PoolRx+ 331055 Purple/White Mineral Algaecide Spa Unit with Silver for 400–1,000 gallons.
Important: PoolRx+ is an EPA-registered algaecide and is not a standalone replacement for chlorine sanitation. Always follow the registered product label, maintain appropriate sanitizer levels, and comply with applicable water quality requirements. Do not use with bromine or biguanide products.
Safety: Keep out of reach of children. Read all product label instructions before use. Do not mix PoolRx+ mineral granules directly with other pool or spa chemicals.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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