Arm & Hammer HardBall is the strongest all-around pick in this comparison for fast hard clumping on a mid-range budget.
Fast-forming hard clumps with baking soda odor help, making it a strong mid-range clay pick if you can tolerate moderate dust.
Extremely low-dust paper pellets that work best for surgery recovery, declawed cats, or severe dust sensitivity rather than everyday clumping use.
HardBall is for scooping firm clumps out of a busy tray. Ökocat is for homes where dust is the thing you are trying to remove. They are answers to two different complaints.
This comparison page is maintained by the ReviewCatLitter editorial team and grounded in the same scoring framework used across the published review catalog.
Choose between them on texture, clumping, dust and price. Then, if the room still tells you where the box is, Purrify is activated carbon you mix into whichever bag you chose. It is what we use in our own homes.
Read our Purrify guide to plant-based litter and odor control.
Every figure below is a reading from our own test runs, not a rating. Where a run never took a reading it says so.
| Reading | Arm & Hammer HardBall | Ökocat Paper Pellet | Gap |
|---|---|---|---|
| Dust weighed per pourDust caught on a filter and weighed while the bag goes into the box. Lower is better. | 0.48 mg | 0.00 mgbetter | 0.48 mg |
| Clumps that survived the drop testShare of clumps still whole after a three-foot drop. Higher is better. | 87% | not measured | only one side measured |
| Bag priceWhat the tested bag cost. Bag sizes differ, so read it next to cost per pound. | $19.99 | $19.99 | level |
| Cost per poundBag price divided by what is in the bag. Lower is better. | $0.53better | $1.00 | $0.47 |
| Cost per dayWhat the box costs to keep running each day. Lower is better. | $0.47better | $0.52 | $0.05 |
| Cost across a yearThat daily cost carried over a full year of use. Lower is better. | $172better | $190 | $18 |
Neither run recorded granules outside the box, ammonia after one day and ammonia after three days, so those rows are left out rather than filled in from a similar bag. The full test data shows every reading we have.
Primary tradeoff: Arm & Hammer HardBall's weakest area here is dust control.
Strongest odor control in this set with baking soda support.
Clumping is a real edge: hard and fast.
It is also the cheapest daily option at $0.47 per day.
Scroll sideways to see every litter. Scores are editorial judgments out of 10.
| Product | ||
|---|---|---|
| Overall Score | 8.5Very good | 8.2Good |
| Pricing | ||
| Price | $19.99 | $19.99 |
| Weight | 38 lbs | 20 lbs |
| Cost / Day | $0.47 | $0.52 |
| Performance | ||
| Dust Control | 6 0.48mg per pour | 10 0.00mg per pour |
| Clumping | 9 Hard and fast | 2.1 Non-clumping pellets |
| Odor Control | 8 Baking soda support | 7.2 Fine with frequent changes |
| Tracking Outside the Box | 6 Moderate | 8.9 Low |
| Value for Cost | 8 $0.47/day · $19.99 | 7.4 $0.52/day · $19.99 |
| Features | ||
| Type | Fast-Clumping Clay | Paper Pellet |
| Flushable | ||
| Scented | Yes | No |
| Our Verdict | ||
| Best For | Fast hard clumping on a mid-range budget | Post-surgery or severe dust sensitivity |
| Read ReviewCheck Price | Read ReviewCheck Price | |
Arm & Hammer HardBall makes the most sense for fast hard clumping on a mid-range budget.
You want fast-forming hard clumps with baking soda odor help, making it a strong mid-range clay pick if you can tolerate moderate dust.
You need a formula that solves fast hard clumping on a mid-range budget better.
Ökocat Paper Pellet makes the most sense for post-surgery or severe dust sensitivity.
You want extremely low-dust paper pellets that work best for surgery recovery, declawed cats, or severe dust sensitivity rather than everyday clumping use.
You need a formula that solves fast hard clumping on a mid-range budget better.
The nearest options to this matchup on score and on price.
Weighed 0.45mg per pour and runs at $0.43 a day.
Weighed 0.08mg per pour and runs at $0.31 a day.
Weighed 0.42mg per pour and runs at $0.40 a day.
Arm & Hammer HardBall comes out ahead on the balance of dust, clumping, odor control, tracking and daily cost. Ökocat Paper Pellet is still the one to buy for post-surgery or severe dust sensitivity.
Arm & Hammer HardBall runs at $0.47 a day against $0.52 for Ökocat Paper Pellet.
Arm & Hammer HardBall scored higher: baking soda support, against fine with frequent changes for Ökocat Paper Pellet.
Ökocat Paper Pellet keeps more litter in the box: low, against moderate for Arm & Hammer HardBall.
Ultra is the cleaner litter. HardBall is the cheaper way to get clumps that set fast and come out in one piece.
Two Arm & Hammer clays built for different things. Clump & Seal is about fragrance and a low bag price.
Ökocat is the only litter we weighed at zero dust, which is what matters after surgery or with a wheezy cat.
Two opposite answers to a smelly box. Clump & Seal buries it under fragrance.
HardBall is the cheaper way to get clumps that set fast and lift whole. Cat Attract only earns its price if your cat has stopped using the tray.
Ökocat is the one to use after surgery or with a cat that reacts to dust: it is the only litter we weighed at zero.