---
product_id: 61103687
title: "PoolRx 101003 4-Pack Blue Units Swimming Pool Algaecide, 4 Pack"
brand: "poolrx"
price: "¥78899"
currency: JPY
in_stock: true
reviews_count: 9
category: "Poolrx"
url: https://www.desertcart.jp/products/61103687-poolrx-101003-4-pack-blue-units-swimming-pool-algaecide-4
store_origin: JP
region: Japan
---

# Supports 7,500-20,000 gallon pools Up to 6 months algae protection Mineral-based continuous algae elimination PoolRx 101003 4-Pack Blue Units Swimming Pool Algaecide, 4 Pack

**Brand:** poolrx
**Price:** ¥78899
**Availability:** ✅ In Stock

## Summary

> 💦 Keep your pool pristine and your weekends free—because algae waits for no one!

## Quick Answers

- **What is this?** PoolRx 101003 4-Pack Blue Units Swimming Pool Algaecide, 4 Pack by poolrx
- **How much does it cost?** ¥78899 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/61103687-poolrx-101003-4-pack-blue-units-swimming-pool-algaecide-4)

## Best For

- poolrx enthusiasts

## Why This Product

- Trusted poolrx brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Chlorine Optimization:** Works synergistically with low chlorine levels to stabilize water chemistry and save you money.
- • **Effortless Installation:** Simply place in your pump or skimmer basket—no complicated setup or maintenance required.
- • **Broad Pool Compatibility:** Each unit effectively treats pools from 7,500 to 20,000 gallons—perfect for any size backyard oasis.
- • **Long-Lasting Algae Defense:** Enjoy crystal-clear water for up to 6 months without constant upkeep.
- • **Mineral-Powered Efficiency:** Proprietary mineral blend continuously dissolves to eliminate algae and reduce chemical use.

## Overview

PoolRx 101003 4-Pack Blue Units is a mineral-based algaecide designed for pools between 7,500 and 20,000 gallons. Each unit provides continuous algae elimination and chemical reduction for up to 6 months by releasing a proprietary mineral blend. Easy to use by placing in the pump or skimmer basket, PoolRx optimizes chlorine efficiency, stabilizes water chemistry, and simplifies pool maintenance, making it a top choice for pool owners seeking hassle-free, long-lasting algae control.

## Description

The 4pack of PoolRx Blue Units is just that. 4 individual units, each PoolRx Blue Unit supports 7, 500 - 20, 000 gallon pools. PoolRx is an easy to use algaecide that reduces chemical demand, improves water quality, lasts for up to 6 months, and really works! PoolRx contains a proprietary blend of minerals that continuously and effectively eliminates algae. Simply pick the correct sized PoolRx unit based on total gallons, clean your filter first, then, drop the PoolRx unit into the pump basket or skimmer. The specially treated alloy cylinder is packed with the PoolRx mineral formulation. These minerals immediately dissolve out of the cylinder and form a stable residual throughout the pool water for up to 6 months. The minerals eliminate the algae while freeing up low levels of chlorine to be more active and productive in the water. During the pools filtration process the minerals are rejuvenated every time they return and pass through the cylinder. PoolRx works synergistically with a constant low level of chlorine. Residential (0. 5-1. 0ppm); Commercial (1. 0-5. 5ppm) If needed, a PoolRx Booster The (part# 102001) can be added for longer seasons, larger pools or tough condition. The PoolRx unit is effective in rejuvenating minerals for up to 1 year in the water, so start with a new PoolRx unit at the beginning of each season for best results. PoolRx has been simplifying pool and spa care since 1994 and can support any size body of water. PoolRx is also ideal for Salt Pools.

Review: Good value. Saves time and money - Great value for what it does. We live in south Florida and we have a covered pool. But we maintain it ourselves and it was taking a lot of energy and money. We never had horrible algae but we had stubborn yellow brown algae that kept coming back and clinging to the side of the pool no matter how often we brushed it. Also the pool ate chlorine up and I was spending a lot of money on chemicals and personal time to clean and rebalance it. I will say the product took a good 2 weeks to clear it all up. But it’s been a few months and I barely have to adjust chemicals at all and the chlorine levels are a lot more stable. I put it in our pool’s filter basket. Maybe why it took longer to notice a big difference? And I will be rebuying it the second I need to. Still too early to tell if it will last 6 months or longer. —-update—- It’s lasted well over 6 months so far and it’s still going strong. I use maybe 1/3 of the chlorine I used to and my alkalinity and ph levels stay stable for longer as well. Haven’t seen a hint of algae growing in months. I’m very impressed. I was initially wary of something that cost so much but it was worth every penny. My pool is crystal clear and stabilized.
Review: Awesome Algae Prevention Insurance! - Very pleased with how this product is keeping me out of the Algae zone big time! I do add some non-chlorine bleach to oxidize the organic stuff, like leaves, dirt mainly, but sweat too if you didn't rinse off first. What you have to consider is how much CYA you have in your pool before because PoolRx requires just .5 to 1.5 ppm max chlorine or it begins to interfere this product. The nature of CYA is it needs to in balance with chlorine keeping your chlorine at 7.5% of the CYA as the minimum and 5 ppm max (like the start of the day). If you don't keep enough chlorine in the pool in conjunction with the CYA, the chlorine is less effective. I find over time the lack of chlorine actually reduced my CYA levels, they work in tandem. I'm guessing that without enough chlorine to kell bacteria, the bacteria deteriorates the CYA over time. Why I have no CYA after winter is over and I haven't added chlorine. Anyway, this isn't going to work right unless I can get that CYA down to about 20 ppm so 7.5% of chlorine is 1.5 ppm and compatable with PoolRx treatment. Right now I'm keeping manually put in about 2ppm liquid chlorine in the morning and it's gone or not active in an evening testing. But, I am not getting any signs of algae. Keeping pH 7.4-7.6 is so important too. The fact I am losing or the high CYA to chlorine factor my not release it to sanitize and I'm getting zero chlorine results end of the day is beyond believable. I will get the rest worked out, but I'm a PoolRx fan now. Update: Well it's been a couple of weeks now and I've had a chance to see how it's going to work long term. We are the thick of summer with consistent over 105 heat occassionally reached 110 and I've had a few days here and there I missed manually checking or adding chlorine. I had only been putting about 2 cups of chlorine in per day as the Pool Rx requires low chlorine levels of .5-1.5 max 2 ppm. So yesterday I added a half a gallon to give it a shock given I ran out of chlorine for a couple of days, but no sign of algae at all. No yellow on the walls as I would get before, either. I did add some non-chlorine to kill the organics, which helps too. My pH rose to 8, and my TA rose back up to 160, and my CYA has dropped too (less chlorine to bind to). I also got a metal test strip, and it's only .2 ppm, so I am good on that front too. No stains and hope no green hair, can't provide any info on that yet. I am just so impressed that I don't have the start of an algae bloom. I highly recommend this product to all pool owners unless copper is a problem for you, but I have a 10,000-gal pool, and the amount is minuscule

## Features

- Simply place in pump basket or skimmer basket
- Eliminates all types of Algae
- Reduces Chemicals
- Effective for up to 6 months
- Simplifies Pool and Spa Care

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00K65T1CW |
| Best Sellers Rank | #3,007 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #10 in Swimming Pool Algaecides |
| Brand | poolrx |
| Brand Name | poolrx |
| Customer Reviews | 4.5 out of 5 stars 9,939 Reviews |
| Included Components | PoolRx 4pack of Blue Units, each supports 7,500-20,000 gallons, and directions for use |
| Item Form | Tablet |
| Item Type Name | Swimming Pool Algaecide |
| Item Weight | 13.1 ounces |
| Manufacturer | PoolRx |
| Manufacturer Part Number | 101003 |
| Model Number | 101003 |
| Number of Items | 4 |
| Number of Packs | 4 |
| Package Size Name | 4 Pack |
| Product Benefits | Controls Algae |
| UPC | 705532371023 700553010036 |
| Unit Count | 4 Count |

## Product Details

- **Brand:** poolrx
- **Item Form:** Tablet
- **Item Weight:** 13.1 ounces
- **Product Benefits:** Controls Algae
- **UPC:** 705532371023 700553010036

## Images

![PoolRx 101003 4-Pack Blue Units Swimming Pool Algaecide, 4 Pack - Image 1](https://m.media-amazon.com/images/I/61PQLL+9hYL.jpg)
![PoolRx 101003 4-Pack Blue Units Swimming Pool Algaecide, 4 Pack - Image 2](https://m.media-amazon.com/images/I/51zg6kstGgL.jpg)
![PoolRx 101003 4-Pack Blue Units Swimming Pool Algaecide, 4 Pack - Image 3](https://m.media-amazon.com/images/I/81snbh8PXuL.jpg)
![PoolRx 101003 4-Pack Blue Units Swimming Pool Algaecide, 4 Pack - Image 4](https://m.media-amazon.com/images/I/71UlXEY8wtL.jpg)
![PoolRx 101003 4-Pack Blue Units Swimming Pool Algaecide, 4 Pack - Image 5](https://m.media-amazon.com/images/I/81NgB2r7-UL.jpg)

## Available Options

This product comes in different **Pattern, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good value. Saves time and money
*by D***C on November 23, 2025*

Great value for what it does. We live in south Florida and we have a covered pool. But we maintain it ourselves and it was taking a lot of energy and money. We never had horrible algae but we had stubborn yellow brown algae that kept coming back and clinging to the side of the pool no matter how often we brushed it. Also the pool ate chlorine up and I was spending a lot of money on chemicals and personal time to clean and rebalance it. I will say the product took a good 2 weeks to clear it all up. But it’s been a few months and I barely have to adjust chemicals at all and the chlorine levels are a lot more stable. I put it in our pool’s filter basket. Maybe why it took longer to notice a big difference? And I will be rebuying it the second I need to. Still too early to tell if it will last 6 months or longer. —-update—- It’s lasted well over 6 months so far and it’s still going strong. I use maybe 1/3 of the chlorine I used to and my alkalinity and ph levels stay stable for longer as well. Haven’t seen a hint of algae growing in months. I’m very impressed. I was initially wary of something that cost so much but it was worth every penny. My pool is crystal clear and stabilized.

### ⭐⭐⭐⭐⭐ Awesome Algae Prevention Insurance!
*by D***E on June 20, 2026*

Very pleased with how this product is keeping me out of the Algae zone big time! I do add some non-chlorine bleach to oxidize the organic stuff, like leaves, dirt mainly, but sweat too if you didn't rinse off first. What you have to consider is how much CYA you have in your pool before because PoolRx requires just .5 to 1.5 ppm max chlorine or it begins to interfere this product. The nature of CYA is it needs to in balance with chlorine keeping your chlorine at 7.5% of the CYA as the minimum and 5 ppm max (like the start of the day). If you don't keep enough chlorine in the pool in conjunction with the CYA, the chlorine is less effective. I find over time the lack of chlorine actually reduced my CYA levels, they work in tandem. I'm guessing that without enough chlorine to kell bacteria, the bacteria deteriorates the CYA over time. Why I have no CYA after winter is over and I haven't added chlorine. Anyway, this isn't going to work right unless I can get that CYA down to about 20 ppm so 7.5% of chlorine is 1.5 ppm and compatable with PoolRx treatment. Right now I'm keeping manually put in about 2ppm liquid chlorine in the morning and it's gone or not active in an evening testing. But, I am not getting any signs of algae. Keeping pH 7.4-7.6 is so important too. The fact I am losing or the high CYA to chlorine factor my not release it to sanitize and I'm getting zero chlorine results end of the day is beyond believable. I will get the rest worked out, but I'm a PoolRx fan now. Update: Well it's been a couple of weeks now and I've had a chance to see how it's going to work long term. We are the thick of summer with consistent over 105 heat occassionally reached 110 and I've had a few days here and there I missed manually checking or adding chlorine. I had only been putting about 2 cups of chlorine in per day as the Pool Rx requires low chlorine levels of .5-1.5 max 2 ppm. So yesterday I added a half a gallon to give it a shock given I ran out of chlorine for a couple of days, but no sign of algae at all. No yellow on the walls as I would get before, either. I did add some non-chlorine to kill the organics, which helps too. My pH rose to 8, and my TA rose back up to 160, and my CYA has dropped too (less chlorine to bind to). I also got a metal test strip, and it's only .2 ppm, so I am good on that front too. No stains and hope no green hair, can't provide any info on that yet. I am just so impressed that I don't have the start of an algae bloom. I highly recommend this product to all pool owners unless copper is a problem for you, but I have a 10,000-gal pool, and the amount is minuscule

### ⭐⭐⭐⭐⭐ Pretty, Pretty, Pretty, Pretty Good.
*by R***L on June 26, 2026*

I am planning to go away for a few weeks in August, so I thought I would buy this to help keep the pool clean while I'm away. My pool was clean when I put it in this morning. To my surprise, after about 3 hours of it being in the pool, my pool looks even cleaner. Very impressed so far, but will know more in subsequent weeks and at the end of August. So far so good. (Now, a few months later in a hot FL summer. NO ALGAE !! This is the first time in years where I did not get some signs of algae in the hard to circulate places. This product seems to work, and will buy it again next year.)

## Frequently Bought Together

- Pool RX 101003 Swimming Pool Algaecide, 4 Pack, Blue
- PoolRX+ Pool Unit 20k-30k gallons (4-Pack)
- PoolRx Booster Minerals for Pool, 7500 to 20000 gallons,4 Pack

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-30*