Low Pro Sieve Set
I sprang for the full 7 piece sieve set. A bit on the expensive side but I really like the quality. It can be a bit tricky to stack a few and run the water through into a 5 gallon pail, so I bent a wire clothes hanger into a frame to hold one or more against the inside which works fine. Mostly I just set them in a sink and run already collected water through. And they are small, so it's easy just to dip them into the fish tank and shake out the brine shrimp or whatever. Filter material appears consistent in its sizing and has worked flawlessly. Just super happy with these.