Reddit mentions of Member's Mark Pet Training Pads, 23" x 24" (120 ct.)

I currently use a corn-based littler, but as I have found in my recent research, it poses health risks. I've also learned that pine seems to be the safest (and cheapest) option out there. It will also fix the issue I have with the corn litter getting tracked EVERYWHERE, constantly, because the granules are as tiny as sand. The corn litter I use also doesn't smell and is flushable, same as the pine as I've learned. Yay!

Speaking of, you mentioned that the pellets turn to sawdust as soon as they get wet—yes, that's the case. This is why you need a littler box that has a grate type of structure with room for the sawdust to fall through and sit in another pan or reservoir. This way all you do is (1) regularly scoop out the poo and dispose of it (such as by flushing) while at the same time (2) push the pellets around so any remaining pee-created sawdust falls into the reservoir (in case the cats didn't manage it themselves), and much less frequently (3) dispose of the sawdust when the reservoir is full, which depends on how often your cat(s) urinate.

I see many sifting boxes that are tightly stacking, which doesn't leave enough room for pine pellet sawdust to fall through on its own, causing you to have to manually sift more frequently. Those systems are designed for typical clumping litters, and require you to lift up one of the (likely heavy) litter-filled boxes to repour and restack—no thanks! That's overall too much work EVERY TIME I have to clean up both cats' business.

There are many sifting litter boxes designed for pine pellet litter, and I am just trying to find the most giant one I can, because my two boys are so big. So far it looks like "Favorite High Sided Double Trayed Pine Sifter Cat Litter Box with Drawer" is the biggest one. It's 21.7" by 17.9", but I do wish it were bigger.

Also, Victorian Gardens Cattery has a refined setup of this type of litter box system (https://www.youtube.com/watch?v=HGhQc-B3euM). I will be setting mine up like hers but with slightly bigger boxes.

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Here are all of the pieces for one system I'm considering:

1. Large Sifting Litter Box for sifter functionality (I will be removing tray portion)
   
   https://www.amazon.com/Favorite-Double-Trayed-Sifter-Litter/dp/B07BLLR4D9/ref=sr_1_39?keywords=sifting+litter+box+xl&qid=1562782153&s=gateway&sr=8-39#customerReviews
   
   
2. XL Litter Box for sawdust reservoir to sit under sifting box (will be a tight fit width-wise but I'm told it works)
   
   https://www.petco.com/shop/en/petcostore/product/so-phresh-gray-open-cat-litter-box
   
   
3. Absorbent Pads to line reservoir for leaks and easy cleanup
   
   https://www.amazon.com/gp/product/B06WRTZ2JB/ref=ox_sc_act_title_1?smid=A1GEJZ8XPRZUHC&psc=1
   
   
4. Kiln Dried Pine Pellets for litter
   
   https://www.walmart.com/ip/America-s-Choice-Bedding-Pellets/39108788
   
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   Actually, I just found this video of someone with a Maine Coon who uses the same type of litter and made his own sifter system (https://youtu.be/gjZFrTHXwr4). I'm considering this option as well, because I'll be able to come away with a much bigger box!
   
   Hope this was helpful!