Wonderfill 12/20 Green is the better infill for dog potty areas and runs, while HydroChill is better for sunny lawns where keeping the surface cool matters most. Wonderfill’s antimicrobial coating and round grains focus on odor control and fast drainage. HydroChill’s coating holds moisture and cools the turf through evaporation. Many San Jose dog owners get the best result by using each one where it fits.
Artificial Turf Express carries both infills at our San Jose yard. This guide compares them on odor control, cooling, drainage, safety, and cost, and shows how to combine them in one yard.
HydroChill vs. Wonderfill at a Glance
| Feature | HydroChill | Wonderfill 12/20 Green |
| Best for | Sunny lawns and play areas | Dog runs, potty areas, pet lawns |
| How it works | Coating holds water, then cools the turf as it evaporates | Coated round sand resists bacteria and drains quickly |
| Antimicrobial | Bac-shield | Zinc Omadine antimicrobial for bacteria, mold, and mildew |
| Cooling | Yes, while moist | No added cooling |
| Drainage | Designed not to impede drainage | Round grains resist compaction and help turf drain faster |
| Feel on turf | Coated sand | Rounder, less abrasive grains help blades stand up |
| Price | $32.92 per 50 lb bag (about $0.66/lb) | $24.78 per 50 lb bag (about $0.50/lb) |
| Mixing | Designed to be used on its own | Commonly used as the full infill layer |
What Is Wonderfill 12/20 Green?
Wonderfill 12/20 Green is a round silica sand with a green acrylic coating that includes Zinc Omadine antimicrobial to help prevent bacteria, mold, and mildew growth. The “12/20” refers to its grain size, a medium grain that settles well between turf blades.
Its rounded shape matters for pet turf. Round grains are less abrasive on turf fibers, resist packing down over time, and leave more open space for liquid to pass through, so urine drains away faster. Wonderfill 12/20 Green is certified non-toxic and listed as safe for pets and kids.
What Is HydroChill?
HydroChill is a coated sand infill with evaporative cooling technology. Its coating soaks up moisture from rain, dew, or a hose, then releases it as the sun heats the turf, which carries heat away from the surface much like sweat cools skin. The version we carry includes Bac-shield antimicrobial protection.
HydroChill cools only while it holds moisture, so in San Jose’s dry season it works best with a short rinse before use. See bag details on the HydroChill product page.
How Do They Compare for Dog Owners?
Which controls pet odor better?
Wonderfill is the stronger choice for odor control in heavy-use pet areas. Its Zinc Omadine antimicrobial coating targets the bacteria, mold, and mildew that cause smells, and its round grains help urine drain through instead of lingering. HydroChill also has an antimicrobial treatment, but its main purpose is cooling.
Infill is only one part of odor control. Fast-draining turf, a well-built base, regular rinsing, and an enzyme cleaner all matter as much as the infill you choose.
Which keeps turf cooler?
HydroChill is the only one of the two built to cool. When it is moist, its evaporative coating lowers surface temperature, and the manufacturer and installers report surface temperatures 30 to 50 °F lower than standard turf systems in their testing. Wonderfill has no cooling feature, though its lighter green coating looks natural and does not hold heat the way dark crumb rubber does.
Rinsing any turf cools it temporarily. Research from Penn State’s Center for Sports Surface Research found that irrigation lowers synthetic turf temperatures, but the effect fades once the sun returns. HydroChill is designed to hold that moisture longer.
Which drains better?
Wonderfill has the edge for drainage in pet areas. Its rounded grains resist compaction, keeping open pathways for urine and rinse water. HydroChill is designed not to impede drainage, but it is engineered to hold some moisture in its coating, which is the point of its cooling.
Are both safe for dogs?
Yes. Artificial Turf Express lists Wonderfill as certified non-toxic and safe for pets and kids, and lists HydroChill as non-toxic and safe for pets and children.
How Much Do HydroChill and Wonderfill Cost?
Wonderfill costs less per bag, at $24.78 versus $32.92 for HydroChill. Both come in 50-pound bags, so you need the same number of bags for the same area and infill rate; only the total price changes.
| Project | Infill needed | Bags | HydroChill | Wonderfill |
| 250 sq ft dog run at 1.5 lb/sq ft | 375 lb | 8 | About $263 | About $198 |
| 560 sq ft lawn at 2.5 lb/sq ft | 1,400 lb | 28 | About $922 | About $694 |
| 1,000 sq ft yard at 2 lb/sq ft | 2,000 lb | 40 | About $1,317 | About $991 |
To work out your own number, multiply your finished turf area by your turf’s recommended infill rate in pounds per square foot, divide by 50, and round up.
Which Infill Should You Choose?
Choose based on what your dog does in each part of the yard:
- Choose Wonderfill for potty areas, dog runs, kennels, and multi-dog yards where odor control and drainage come first.
- Choose HydroChill for sunny lawns and play areas where kids and dogs spend time in the afternoon, and you are willing to give the turf a quick rinse in summer.
- Choose both when one yard has a dedicated potty zone and a separate play lawn. This is the setup we recommend most often.
Using HydroChill and Wonderfill in the Same Yard
You can use both by zoning the yard: Wonderfill under the dog’s potty area and HydroChill across the main lawn. Install each as its own infill in its own zone rather than blending them, since HydroChill is designed to be used on its own.
For example, a 600-square-foot backyard might have a 150-square-foot potty strip along a side fence and a 450-square-foot play lawn.
| Zone | Turf | Infill | Rate | Bags |
| Potty strip, 150 sq ft | Express PET | Wonderfill 12/20 Green | 1.5 lb/sq ft | 5 |
| Play lawn, 450 sq ft | Coronado Platinum | HydroChill | 2.5 lb/sq ft | 23 |
| Total | 28 |
On the lawn side, Coronado Platinum pairs well with HydroChill. Its fibers use heat-reduction technology that reflects more sunlight, while HydroChill cools from below through evaporation.
On the pet side, our Pet Turf System combines Express PET grass, AirDrain tiles, and Wonderfill 12/20 Green into one setup built for drainage and odor control.
Care Tips for Either Infill
Both infills last longest with the same simple routine. Pick up solid waste daily, rinse potty areas at least weekly, and brush the turf every few weeks so blades stand up and infill stays evenly spread. Top up infill in high-traffic paths when backing starts to show.
For odor, use a turf-safe enzyme cleaner on high-use spots about once a month and skip bleach and ammonia. The ASPCA Animal Poison Control Center notes that most cleaning products are safe around dogs when used according to label directions, so follow the label and let the turf dry before your dog goes back out.
In San Jose’s dry season, roughly May through October, give HydroChill areas a short rinse before afternoon use to recharge its cooling.
5. FAQ
Is HydroChill or Wonderfill better for dogs?
Wonderfill is better for dog potty areas and runs because it focuses on odor control and fast drainage. HydroChill is better for sunny lawns where cooling matters most.
Can I mix HydroChill and Wonderfill?
HydroChill is designed to be used on its own, not mixed with other infills. To use both, put each in its own zone, such as Wonderfill in the potty area and HydroChill on the main lawn.
Does Wonderfill keep turf cool?
Wonderfill has no built-in cooling feature. A quick rinse, shade, and heat-reducing turf fibers help keep a Wonderfill lawn comfortable in summer.
Does HydroChill control pet odor?
HydroChill includes Bac-shield antimicrobial protection, but its main purpose is cooling. For heavy-use potty spots, Wonderfill is the stronger odor-control choice.
How many bags of infill do I need for a dog run?
Multiply your dog run’s area by your turf’s infill rate, then divide by 50. A 250-square-foot run at 1.5 pounds per square foot needs 8 bags of either infill.
Which infill is cheaper?
Wonderfill 12/20 Green is $24.78 per 50-pound bag, and HydroChill is $32.92 per bag, so Wonderfill costs about 25% less for the same coverage.
Are HydroChill and Wonderfill safe for pets and kids?
Yes. Artificial Turf Express lists both as non-toxic and safe for pets and children.
Get HydroChill and Wonderfill in San Jose
Wonderfill keeps pet zones fresher; HydroChill keeps sunny lawns cooler. For most dog yards, the best answer is Wonderfill where your dog goes and HydroChill where everyone plays. Artificial Turf Express keeps both infills, pet turf, and installation supplies in stock and ready for pickup in San Jose. Contact Artificial Turf Express by calling (408) 413-3179 or visiting us at 370 Umbarger Rd, San Jose, CA 95111.
