Pool Unit #101066 6 Month Algaecide Treats 20k-30k gallons, Black

Plug and play and forget for six months. I live in east central Florida and my pool (~25.000 gal salt) gets a lot of summer use (April into October) and I keep it about 85+ degrees with the solar on. I used to use a broad-spectrum liquid algicide applied weekly. A bottle would last a month but at $38 a bottle, it was pricey, not to mention you had to remember to add it regularly to keep the algae from appearing. I started using the PoolRx product a year ago - GAME CHANGER! You drop the unit in the pump filter basket chamber and forget it for 6 months...and NO ALGAE! No apparent effect on water quality or water chemistry balances, no odor, no corrosion of metal components (ladders) or surface or grout staining - it just flat works! Highly recommended. (If you're unsure about which unit to buy based on your pool's displacement in gallons, I'd err on the up side get the bigger unit in terms of pool gallon size.)

I've been using PoolRX for approx. 6 years. Its an amazing product that not only works but has saved me hundreds of dollars from not needing to buy other pool chemicals such as algicide and has reduced my need to shock the pool every week. I just drop the pod in the pool pump housing basket and walk away. It keeps the pool water crystal clear and totally eliminates all types of algae, green yellow and black. In approx. six months another PoolRx arrives at my home and I just replace the old Pod with the new one. Its that simple!

Every year during summer vacation travel we return to a green pool. This year I wanted to try out PoolRX to see if could really make a difference. I accidentally got the largest pool sized item instead of the smallest but it did work, just way more effective than expected. If you have a pool service or regularly get chemicals understand both don't like this product as it works different and makes some chemicals un-necessary or outright not needed. Namely the copper levels will go way up and this can make using shock hazardous to your pool's finish. Again I used one way oversized so it was too much for my small pool but it did work. As the pool was barely starting to tinge green I put this is the basket and ran the pool for a day and water was clear the next morning and remained so the next 2 weeks. When I took a sample in to confirm alkalinity and PH (both fine) the copper was way too high (1.7ppm) so trying to balance everything else was a problem. I will be getting the correct sized one next, for the smallest pools, and use this in July when we are gone for 3 weeks. I was impressed in the performance just didn't realize it was for much larger pools. I like not having to use multiple conditioners, brighteners, and sanitizers. I will revise after getting the pool at a good baseline and using the correct sized one at the height of the season.

This thing is a miracle. I struggled with algae and cloudy water for weeks even though I kept the chemicals balanced. I had to vacuum the pool through the backwash almost everyday just to keep it clean enough to use but the morning after I ran this product in my filter the water was crystal clear and there wasn’t residue on the pool bottom.

The Pool RX-Black works well... It is expensive ($90/unit-good for a 25-30K gallon pool) and in the CA summer heat may not last the full advertized 6 mos effective life. It also requires that you keep your pool chemistry balanced (free Chlorine levels, pH, Alkalinity, Ca Hardness). I have tried a number of other liquid algicides with mostly marginal to poor results - they are all expensive, especially if you have to keep adding more because they aren't doing an effective job and you have to do extensive cleaning to keep the algae off the bottom and sides of the pool. The Pool RX unit just sits in the skimmer or pre-filter basket and controls both black and yellow algae (good pool chemistry is important). If I got the full 6 mos of effective control with one unit, I would have given Pool RX 5 stars.

I'm impressed how clear the pool water has been. This is my first summer with a pool so this has been a big help. I use chlorine tablets that dissolves very slow so this will save me money. Also ph levels have been steady. No worries about algae. Will purchase again.

So, I've had a chance to use this product for a while and write a proper review. I have an inground vinyl lined pool of about 25,000 gallons. For 32 years I have had issues dealing with algae. I was tired of spending a $100 on a gallon of algaecide at Leslie's that was barely effective and would still get some algae. I saw Pool Rx and decided to give it a try. The description states that it will last up to 6 months. Our summers are brutal with a lot of days over 100 degrees and decided if this controlled algae for at least three months I would be very pleased. Yesterday was the three month period and I have not seen a speck of algae since I started using Pool Rx. That has never happened in 32 years. I am very pleased how this has worked in my pool. As an added benefit I am using far less chlorine in the pool. With dichlor costing $300 for 50 lbs, this product is paying for itself. I even bought the booster but haven't had to use it yet. I would highly recommend this for anyone's pool. Update: May 1, 2026. It's been 12 days shy of one year when I installed this. Just yesterday I noticed a tiny bit of algae in the pool for the first time since installation. Amazing! Never used the booster that I ordered. I put in a new cartridge today, looking forward to another year of no algae.

My pool people introduced me to this about 2 years ago. It works great! It has reduced my chemical needs probably by half. During the spring when the pines are in full pollen bloom, the algae would be crazy. After introducing PoolRx, no green, just crystal clear water and clean pool!

Absolutely perfect works like a treat would recommend and am buying another one now simplicity as it’s best quality