Zodiac R0306200 Limestone Gravel Replacement Kit for Zodiac Jandy Hi-E2 Pool and Spa Heater Go to amazon.com Related posts Top 10 recommendation limestone gravel for plants 2024 FeatureLimestone gravel replacement kitFits Zodiac Jandy Hi-E2 pool and spa heater models 220, 350 DescriptionThis limestone gravel kit is designed to use with Zodiac Jandy Hi-E2 pool and spa heater models 220, 350.