Dr. Elsey's Ultra is the strongest all-around pick in this comparison for dust-sensitive homes.
The gold standard for dust-free clay litter. Rock-solid clumps, very low dust, and excellent day-to-day usability.
Flat Top clumping tech keeps litter on the surface, making scooping cleaner and easier than typical premium clay formulas.
Ultra gives you the hardest clumps and the lightest dust for less money. Boxiecat earns the difference only if you hate digging: its clumps sit on the surface, so a scoop takes seconds and you disturb far less litter each time you do it.
This comparison page is maintained by the ReviewCatLitter editorial team and grounded in the same scoring framework used across the published review catalog.
We own Purrify.
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.
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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 | Dr. Elsey's Ultra | Boxiecat Premium | Gap |
|---|---|---|---|
| Dust weighed per pourParticulates caught in the air while the bag goes into the box. Lower is better. | 0.03 mgbetter | 0.04 mg | 0.01 mg |
| Clumps that survived the drop testShare of clumps still whole after a three-foot drop. Higher is better. | 98%better | 94% | 4 points |
| Granules outside the boxCounted inside the 12-inch ring around the tray. Lower is better. | 18 granules | 10 granulesbetter | 8 granules |
| Bag priceWhat the tested bag cost. Bag sizes differ, so read it next to cost per pound. | $20.99 | $27.99 | $7.00 |
| Cost per poundBag price divided by what is in the bag. Lower is better. | $0.52better | $0.70 | $0.18 |
| Cost per dayWhat the box costs to keep running each day. Lower is better. | $0.43better | $0.55 | $0.12 |
| Cost across a yearThat daily cost carried over a full year of use. Lower is better. | $157better | $201 | $44 |
Neither run recorded 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: Dr. Elsey's Ultra's weakest area here is tracking.
Best dust control here at 0.03mg per pour.
Clumping is a real edge: rock-solid.
It is also the cheapest daily option at $0.43 per day.
| Product | ||
|---|---|---|
| Overall Score | 9.4 | 9.2 |
| Pricing | ||
| Price | $20.99 | $27.99 |
| Weight | 40 lbs | 40 lbs |
| Cost / Day | $0.43 | $0.55 |
| Performance | ||
| Dust Control | 9.4 0.03mg per pour | 9 0.04mg per pour |
| Clumping | 9.8 Rock-solid | 9.4 Flat-top easy scoop |
| Odor Control | 8.5 Strong unscented control | 8.7 Strong everyday control |
| Tracking Outside the Box | 7.2 Moderate | 8.2 Low |
| Value for Cost | 8.8 $0.43/day · $20.99 | 8 $0.55/day · $27.99 |
| Features | ||
| Type | Clumping Clay | Premium Clumping Clay |
| Flushable | ||
| Scented | No | No |
| Our Verdict | ||
| Best For | Dust-sensitive homes | Lowest-maintenance scooping |
| Read ReviewCheck Price | Read ReviewCheck Price | |
Dr. Elsey's Ultra makes the most sense for dust-sensitive homes.
You want the cleanest clay experience with hard clumps and low dust.
You need flushable or lightweight litter.
Boxiecat Premium makes the most sense for lowest-maintenance scooping.
You want premium convenience and cleaner scooping in a multi-cat box.
You are strictly optimizing for low upfront cost.
The nearest options to this matchup on score and on price.
Weighed 0.04mg per pour and runs at $0.56 a day.
Runs at $0.80 a day. Its dust was never weighed.
Weighed 0.11mg per pour and runs at $0.63 a day.
Dr. Elsey's Ultra comes out ahead on the balance of dust, clumping, odor control, tracking and daily cost. Boxiecat Premium is still the one to buy for lowest-maintenance scooping.
Dr. Elsey's Ultra runs at $0.43 a day against $0.55 for Boxiecat Premium.
Boxiecat Premium scored higher: strong everyday control, against strong unscented control for Dr. Elsey's Ultra.
Boxiecat Premium keeps more litter in the box: low, against moderate for Dr. Elsey's Ultra.
Choose Ultra if dust or fragrance bother anyone in the house. Choose Clump & Seal if the price of the bag decides it.
Ultra is scoopable clay. PrettyLitter is crystals that change color to flag a health problem.
Buy Ultra unless your cat has stopped using the box, which is the one job Cat Attract does better.
Ultra is the cleaner litter. HardBall is the cheaper way to get clumps that set fast and come out in one piece.
Super Scoop is the cheapest honest way to keep a box going. Ultra is what you buy when cheap keeps leaving broken clumps in the tray.
Ultra if you want the box to stop smelling of perfume and stop clouding when you pour. Fresh Step if you want it in the cart tonight.