--- product_id: 38841741 title: "PoolRx 400-1K Gallon Black Spa Unit" brand: "poolrx" price: "506 kr" currency: DKK in_stock: true reviews_count: 8 url: https://www.desertcart.dk/products/38841741-poolrx-400-1k-gallon-black-spa-unit store_origin: DK region: Denmark --- # Up to 6 months algae protection Reduces chemical usage Easy place & forget design PoolRx 400-1K Gallon Black Spa Unit **Brand:** poolrx **Price:** 506 kr **Availability:** βœ… In Stock ## Summary > πŸ’§ Stay cool, clear, and chemical-smart with PoolRx – your pool’s secret weapon! ## Quick Answers - **What is this?** PoolRx 400-1K Gallon Black Spa Unit by poolrx - **How much does it cost?** 506 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/38841741-poolrx-400-1k-gallon-black-spa-unit) ## 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 - β€’ **Chemical Smart:** Significantly reduces the need for harsh chemicals, keeping your pool eco-friendly and skin-friendly. - β€’ **Hassle-Free Maintenance:** No complicated setupsβ€”just insert, run your filter, and enjoy simplified pool care all season long. - β€’ **Crystal Clear Confidence:** Keeps your pool water sparkling clear even in extreme heat, preventing algae without staining surfaces. - β€’ **Effortless Algae Defense:** Simply place in pump or skimmer basket and let it work its magic for up to 6 months. - β€’ **Long-Lasting Performance:** One tablet covers up to 1,000 gallons, delivering continuous algae control through the hottest seasons. ## Overview PoolRx 400-1K Gallon Black Spa Unit is a compact, easy-to-use algae eliminator tablet designed for pools and spas up to 1,000 gallons. It provides up to 6 months of continuous algae control, reduces chemical dependency, and simplifies maintenance by fitting directly into your pump or skimmer basket. Trusted by users in extreme heat, it keeps water crystal clear without staining, making pool care effortless and efficient. ## Description Poolrx 101055 Review: Hot weather life saver - I'm down in Austin where the heat can just kill you for almost half the year. It isn't even August yet and we have had more then 40 days over 100 degrees. That can do terrible things to a pool. Mine is 30K gallons and 8ft deep. I have to add water to it about every three days, about 2-3 inches so that the pump keeps working. However, it is staying crystal clear, without any algae despite the temperature being over 80 in the water and the chlorine levels being almost nil. Why, this little beauty. I shock the water maybe once a week because you need to in order to trigger the copper. The copper kills the algae but isn't enough to hurt your pool chem levels. Our plaster is brand new and has no stains on it. I can attest to that! I've been using this product for 3 years now I think. I've never had one explode, break, etc. A brand new one may put out what looks like an inky blue dye. That is the copper and it is normal. Leave it in your filter! Keep running your filter. Make sure you but the right size and ALWAYS read the directions. The only thing I don't do that they suggest is I rinse my paper filter after a couple of days due to pressure dropping if I started with an algae issue and the filter is filthy. Think of the blue stuff like medicine. Let it work. It fades. It is making your water more blue and taking out the icky green stuff. As for any grit you may get, use a clarifyier, run your robot to suck it up and you're good to go. That grit is dead algae or charcoal dust. No harm done. Review: Works Amazingly - Definitely a Best Purchase - I have this product on every three month auto-delivery, which works perfectly for the max performance. These little filter looking cartridges pack an algae eliminating punch! I keep a tablet in my swim spa and added this to aid in summertime max algae season. I was impressed how this little thing can extend tablet life and even work on its own when initially installed. I can't explain how something so great and convenient can be so unknown and difficult to find! You will be happy you gave it a try!!!! ## 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 | B01C2OQIFC | | Best Sellers Rank | #351,889 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #151 in Swimming Pool Algaecides | | Brand | poolrx | | Customer Reviews | 4.4 4.4 out of 5 stars (175) | | Item Form | Tablet | | Item Weight | 1.9 ounces | | Item model number | 101055 | | Manufacturer | PoolRx | | Number of Items | 1 | | Product Benefits | Eliminates and Controls Algae | | Product Dimensions | 1.5 x 1.5 x 2.25 inches | | UPC | 705532371146 784922653628 700553010555 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** poolrx - **Item Form:** Tablet - **Item Weight:** 1.9 Ounces - **Product Benefits:** Eliminates and Controls Algae - **UPC:** 705532371146 784922653628 700553010555 ## Images ![PoolRx 400-1K Gallon Black Spa Unit - Image 1](https://m.media-amazon.com/images/I/81PwHQ818IL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Hot weather life saver *by L***M on July 27, 2022* I'm down in Austin where the heat can just kill you for almost half the year. It isn't even August yet and we have had more then 40 days over 100 degrees. That can do terrible things to a pool. Mine is 30K gallons and 8ft deep. I have to add water to it about every three days, about 2-3 inches so that the pump keeps working. However, it is staying crystal clear, without any algae despite the temperature being over 80 in the water and the chlorine levels being almost nil. Why, this little beauty. I shock the water maybe once a week because you need to in order to trigger the copper. The copper kills the algae but isn't enough to hurt your pool chem levels. Our plaster is brand new and has no stains on it. I can attest to that! I've been using this product for 3 years now I think. I've never had one explode, break, etc. A brand new one may put out what looks like an inky blue dye. That is the copper and it is normal. Leave it in your filter! Keep running your filter. Make sure you but the right size and ALWAYS read the directions. The only thing I don't do that they suggest is I rinse my paper filter after a couple of days due to pressure dropping if I started with an algae issue and the filter is filthy. Think of the blue stuff like medicine. Let it work. It fades. It is making your water more blue and taking out the icky green stuff. As for any grit you may get, use a clarifyier, run your robot to suck it up and you're good to go. That grit is dead algae or charcoal dust. No harm done. ### ⭐⭐⭐⭐⭐ Works Amazingly - Definitely a Best Purchase *by J***Z on March 12, 2024* I have this product on every three month auto-delivery, which works perfectly for the max performance. These little filter looking cartridges pack an algae eliminating punch! I keep a tablet in my swim spa and added this to aid in summertime max algae season. I was impressed how this little thing can extend tablet life and even work on its own when initially installed. I can't explain how something so great and convenient can be so unknown and difficult to find! You will be happy you gave it a try!!!! ### ⭐⭐⭐⭐ makes an enjoyable spa experience. *by S***R on November 27, 2020* We have used this product for 7 yrs. We have been very happy with it until this fall when we got a defective one. It turned our water green and didn't work. I didn't find that out until after the time I could return it to Amazon so am out the money for it. I got another one locally and we are back to normal and enjoying the spa again. They are a great product when they work. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.dk/products/38841741-poolrx-400-1k-gallon-black-spa-unit](https://www.desertcart.dk/products/38841741-poolrx-400-1k-gallon-black-spa-unit) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-04-23*