Complete Reef Care 4‑Part is a complete dosing system designed to make reef maintenance more convenient without extra cost. With long‑term research showing that key elements in reef aquaria without refugium are consumed in a consistent ratio, this program lets hobbyists achieve optimal coral growth and vivid colours with only one test per week.

The dosing regime is based around a single weekly Calcium test, which automatically determines the correct doses for all four components. Formulated so that Calcium, Alkalinity, Minor and Trace elements are used up simultaneously, Complete Reef Care 4‑Part simplifies reef maintenance. When used with Red Sea’s ReefDose dosing system, you set only the Calcium level and ReefDose adjusts the other components for you.

Key Features:

• Four‑part dosing system optimised for reef tanks without refugium
• Only one weekly Calcium test required
• Balanced formulation ensures all parts are consumed together
• Compatible with ReefDose automatic dosing
• Chemically identical to Red Sea’s original 7‑part program
• Available in three sizes to suit different aquarium volumes

Complete Reef Care 4‑Part delivers the same great results as a 7‑part dosing program but with greater convenience. For systems with a refugium, the original 7‑part RCP is recommended to maintain all elements appropriately.

Specifications:

• Small: for aquariums up to 150 L (0.5 L Calcium & Magnesium, 1 L Alkalinity & pH stabilizer, 0.25 L Iodine & Potassium, 0.25 L Iron & Bioactive elements)
• Medium: for aquariums up to 300 L (1 L Calcium & Magnesium, 2 L Alkalinity & pH stabilizer, 0.5 L Iodine & Potassium, 0.5 L Iron & Bioactive elements)
• Large: for aquariums up to 600 L (2 L Calcium & Magnesium, 4 L Alkalinity & pH stabilizer, 1 L Iodine & Potassium, 1 L Iron & Bioactive elements)

This 4‑part solution supports healthier coral growth with reduced testing effort and coordinated dosing for balanced water chemistry in reef aquaria.

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We really want you to be happy with the product that you've received. If however, when the goods arrive they're not what you want, then no problem - we have a 60 day no quibble return guarantee. Just let us know that you're going to return the item(s) by contacting us(stating your Order Number) and complete the returns packing slip that will have been included with your delivery. This will help us to quickly identify the item that you have returned (unopened and unused) - and we'll put a refund through for you.