Pool Frog 01034613 (3) Pack New Water Cycler Pac 407C Replacement for Model 400 Model 400 in-line Cycler for in ground pools up to 40,000 gallons. Uses a 7-pound pre-filled Cycler Pac Model 430 off-line Cycler for in ground pools up to 25,000 gallons. Uses a 7-pound pre-filled Cycler Pac