Thank you for your question. Without knowing your hatching requirements, it is difficult to provide an appropriate recommendation. The Continuous Hatch 'N Feeder (#15546) would be a convenient choice, especially if you need a steady supply of freshly-hatched brine shrimp. If you require a large number of brine shrimp per hatching, the Artemia Cultivation Unit would be a better choice. The Aqua Breed 200 (#11029) has a capacity of 400,000 cysts per hatch, while the Aqua Breed 1000 has a capacity of 2,000,000 cysts per hatch! Fot further assistance, please contact our Customer Service Department at 1-800-443-1160 or email CustomerService@FosterandSmithAquatics.com.