Evergreen’s Aquatic Compost contains a mix of heavy loam-based compost and grit to ensure the good anchorage and healthy development of all submerged, floating and marginal aquatic plants in ponds, rock pools and water features. The slow release feed assists with nutrimental development whilst preventing the greening of water, and is safe for all pond life. The addition of loam assists with nutrient retention. Offers feed up to 6 weeks.