Every pool owner knows the drill. You open the pool, dump in the chemicals, run the pump, and yet... the water still looks a little dull. Or worse, you’re greeted by that harsh, stinging "chlorine smell" that leaves your eyes red and your skin itchy.
You might think your pool chemicals are to blame, but the real culprit is likely hiding inside your filter tank.
For decades, traditional silica sand has been the gold standard for pool filtration. But sand has a dirty secret. It’s a breeding ground for bacteria, it wears out quickly, and it lets a surprising amount of debris slip right back into your pool.
Enter the glass revolution: Dryden AFM®-ng (Activated Filter Media - New Generation). If you are tired of constant backwashing, cloudy water, and heavy chemical usage, here is why switching to AFM-ng is the best upgrade you can make for your pool this season.
The Problem with Sand: The "Biofilm" Trap
To understand why AFM-ng is so revolutionary, we first have to look at what happens inside a standard sand filter.
Within just a few days of installing fresh filter sand, bacteria begin to colonize the grains. To protect themselves from the chlorine in your water, these bacteria secrete a slimy, jelly-like substance called biofilm.
This biofilm causes two major problems:
- Channeling: The slime glues the sand grains together, creating solid clumps. Water always takes the path of least resistance, so it forces its way around these clumps, creating literal channels. Unfiltered water, and all its dirt, runs straight through these channels and back into your pool.
- That "Chlorine Smell": When chlorine reacts with the bacteria living in the filter's biofilm, it creates harmful byproducts called trichloramines. This is what causes that intense chemical smell, burning eyes, and irritated skin. It’s not too much chlorine in your pool; it's a dirty filter!
Enter AFM®-ng: The Self-Sterilizing Super-Media
Dryden AFM-ng completely rewrites the rules of pool filtration. Made from 100% upcycled green and brown container glass, it undergoes a patented 3-step chemical and thermal activation process. This process changes the glass's surface structure, giving it two incredible superpowers:
1. It is 100% Bio-Resistant
The surface of AFM-ng activates a catalytic reaction that creates free radicals on contact. In plain English: it creates a self-sterilizing zone where bacteria cannot survive. Because bacteria cannot stick to the glass, biofilm can never form. No biofilm means no channelling, no bacterial colonies, and up to a 50% reduction in irritating trichloramines.
2. It Filters Down to an Astonishing 1 Micron
Traditional pool sand only filters out particles down to about 20 or 30 microns. AFM-ng is certified to filter down to 1 micron without any extra pool clarifiers or coagulants. It traps everything from microscopic organic matter to algae spores, leaving you with pool water that doesn’t just look clean, it sparkles like diamonds.
How AFM®-ng Saves You Money, Water, and Time
While the upfront cost of glass media is higher than a standard bag of sand, AFM-ng quickly pays for itself in operational savings:
- Saves Water & Chemicals: When sand gets clogged with biofilm, backwashing is inefficient and wastes thousands of gallons of water. Because AFM-ng doesn't stick together, dirt is easily washed away. Your backwash cycles are cut in half, saving you massive amounts of water, heated energy, and the expensive chemicals required to top off your pool.
- It lasts a Lifespan: Pool sand rubs against itself, gets worn smooth, and calcifies, requiring replacement every 3 to 5 years. AFM-ng is highly durable and retains its bio-resistance indefinitely. It will easily outlast your actual filter tank.
Meet the Combi-Bag: Advanced Filtration Made Easy
Historically, upgrading to glass media meant playing a guessing game of math. You had to calculate exactly how many bags of Grade 1 (Fine) and Grade 2 (Medium) glass you needed to layer inside your tank.
To make life easier for residential pool owners, Dryden introduced the AFM-ng Combi-Bag.
The Combi-Bag comes pre-blended with the perfect, optimized ratio of Grade 1 and Grade 2 media right inside a single bag. It takes the guesswork completely out of the equation. Designed specifically for smaller residential, inground, and above-ground pool filters, you just open, pour, and enjoy premium commercial-grade filtration.
Pro-Tip on Sizing: Because AFM-ng is less dense than sand, it takes up more space. You actually need 15% less weight than what your filter's sand rating calls for! For example, if your filter requires 35 lbs of sand, you only need about 30 lbs of AFM-ng (roughly 1.2 Combi-Bags).
Ready for Crystal Clear Water?
Your pool should be a place of relaxation, not a source of endless chemical troubleshooting and murky water frustration. By replacing your old, slime-prone filter sand with self-sterilizing AFM-ng, you are investing in healthier water, lower energy bills, and a drastically lower maintenance routine.
Make the switch this season, your eyes, your skin, and your wallet will thank you!
