Crystal cat litter and tofu cat litter each have their own advantages and disadvantages. Owners can choose the right cat litter based on their actual needs and their cat's living habits.
Advantages and disadvantages of crystal cat litter:
1. Advantages: Crystal cat litter is primarily made of silica gel, producing no dust and preventing clumping. It is lightweight, economical in usage, and easy to handle. Crystal cat litter has strong adsorption and water absorption capabilities, excellent deodorizing ability, and effectively keeps the litter box dry, reducing bacterial growth.
2. Disadvantages: Crystal cat litter is prone to developing sharp edges during the manufacturing process, which can easily prick a cat's paws. The granular texture of crystal cat litter can be unpleasant for some cats. Also, urine is quickly absorbed by the litter, making it difficult to observe the cat's urination. 
Advantages and disadvantages of tofu cat litter:
1. Advantages: Tofu litter is made from tofu residue, making it non-toxic, harmless, and very environmentally friendly. Tofu cat litter clumps well, produces little dust, and is water-soluble, so it can be flushed down the toilet after use.
2. Disadvantages: Tofu cat litter is fragile and sticky, easily getting stuck to the bottom and difficult to clean. Furthermore, if not cleaned promptly, it can react chemically with urine, creating an unpleasant odor. Tofu cat litter also easily absorbs moisture, potentially attracting insects over time.