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Your cart is empty.4.7 out of 5 stars
- #383,390 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
- #209 in Swimming Pool Algaecides
The Ultima NIX formula is the industry's first combination algaecide and phosphate remover. This powerful dual action product is designed to keep your pool free of algae all season long by reducing phosphates and eliminating algae. It is compatible with all sanitizing systems and, best of all, swimmers can resume pool use immediately after treatment.
That-Guy-In-NC
Reviewed in the United States on March 30, 2025
Nix is an excellent product. Use it every summer and works well for my inground pool.
Lela E.
Reviewed in the United States on October 31, 2024
I have used this for years after my pool company recommended it. It lasts and it works
brenda
Reviewed in the United States on April 2, 2024
It's better than any outside. I've ever used and I've had a pool for 40 years.
Customer
Reviewed in the United States on July 6, 2023
This is my first pool season using this as my algaecide and the results are great so far.The pricing is just a little off.... $49 each or a 2pk for $114....HUH?
Teresa Perdue
Reviewed in the United States on July 22, 2021
I love this product BUT it cost way to much money. It works but the price has doubled since last year!
Robert B.
Reviewed in the United States on July 30, 2018
Works great as an algicide and has allowed me to get on top of phosphates issues that have plagued me for the last 2 years. I was constantly scooping out the nasty green stuff and the pool looked like a stagnant irrigation pond every time I would go to use it. When the algae would get kipper off from the chlorine, shock and algicide the bottom had 1/2" of white powder for my vacuum cleaner to pick up. This was every week and I don't drain or add non potable drinking water to the pool.Anyone that tells you phosphates are never the issue on pool chlorine use, algae growth and even PH balance has never had to fight the issue. I was using 10 to 20 lbs of chlorine a week along with shocking every few days and the chlorine levels were never consistent. My PH would constantly fall about .2 every day. I used 2 50 pound bags of soda ash in 5 months in 2016 to keep the PH at 7.0 and could never get it higher. I started using nix early in the 2016 season closing with it and have used it consistently since then.A month into the 2017 season it started turning around. My chlorine usage dropped to what I would consider normal for a 30,000 gallon pool, averaging 8 3 inch tabs every 7 days. PH has held at 7.2 with only 10 lbs of soda ash used in 2017 and 8 lbs this year for the 2018 season so far. For 2018 I am using about 5 to 6 3 inch tabs and pool has never looked this good. No algae, PH and chlorine stay consistent only shocked when opened and every 2 weeks compared to every few days when I started battling phosphates and algae growth.
Jim R.
Reviewed in the United States on October 8, 2017
This is the best algae killer/inhibitor I have ever used. Texas summers are hot and Nix kept the algae from growing even in ideal conditions. I have spent a fortune they the years at a national chain with very mixed results.
Beth
Reviewed in the United States on August 18, 2016
phosfree works better
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