The Arid C36 Ca Feed Injection Assembly is a versatile piece of equipment designed to work seamlessly with calcium reactors in saltwater reef aquariums. This compact manifold threads directly into the water inlet on the base of the ARID c36, facilitating the injection and mixing of calcium reactor effluent with the main water flow before it reaches the macro-algae filter media. It includes a drip counter for precise control over the calcium-rich water entering the system and four restriction discs to adjust the flow rate according to specific needs. This assembly optimizes nutrient uptake by increasing the growth rate of macroalgae, enhancing dissolved oxygen levels in the reef tank.