---
product_id: 1627386
title: "Reef Complete 500ml"
brand: "seachem"
price: "€ 31.73"
currency: EUR
in_stock: true
reviews_count: 8
category: "Seachem"
url: https://www.desertcart.de/products/1627386-reef-complete-500ml
store_origin: DE
region: Germany
---

# Balanced magnesium & strontium for natural seawater harmony 160,000 mg/L ionic calcium - market's highest concentration 100% soluble formula - no shaking, no residue Reef Complete 500ml

**Brand:** seachem
**Price:** € 31.73
**Availability:** ✅ In Stock

## Summary

> 🌟 Keep your reef thriving with the purest calcium boost on the market!

## Quick Answers

- **What is this?** Reef Complete 500ml by seachem
- **How much does it cost?** € 31.73 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/1627386-reef-complete-500ml)

## Best For

- seachem enthusiasts

## Why This Product

- Trusted seachem brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **pH-Stable Formula:** Supports coral health without altering your tank’s delicate pH balance.
- • **Balanced Reef Chemistry:** Includes magnesium and strontium in perfect ratios to maintain natural seawater conditions.
- • **Trusted by Reef Enthusiasts:** Highly rated with 4.7 stars from 700+ reviews—perfect for both new and seasoned reef keepers.
- • **Crystal Clear & Ready-to-Use:** 100% soluble liquid formula means no milky residue or shaking—just pure performance.
- • **Ultra-Concentrated Ionic Calcium:** Boost coral growth with the market’s strongest 160,000 mg/L calcium source.

## Overview

Seachem Reef Complete 500ml is a premium liquid ionic calcium supplement delivering an unmatched 160,000 mg/L concentration. Designed to maintain natural seawater calcium levels without affecting pH, it also provides balanced magnesium and strontium to support optimal coral growth and health. Its 100% soluble, clear formula ensures easy dosing with no residue, making it a top choice for reef aquarists seeking reliable, effective calcium supplementation.

## Description

Reef complete is a concentrated optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater without affecting pH. Calcium and carbonates are essential to all coral growth. If either becomes deficient, coral growth will cease, followed by a rapid decline in coral health. To prevent this you must provide calcium (reef complete) and carbonates (reef builder or reef carbonate). reef complete also includes magnesium and strontium in amounts proportionate to typical utilization ratios. This allows one to maintain These two important elements while maintaining calcium.

Review: Quick and easy to tank of corals - Good stuff to add to aquariums
Review: Keep your corals happy! - Works as it should, priced competitively, so whats not to like? Great for getting your calcium up with minimal solution. I use it in conjunction with the Reef Fusion 1 & 2, but this gets the calcium and magnesium up without iron that can be utilized by algae. Also it is more concentrated than the Reef Fusion 1, so it is very useful when your calcium levels take a dip and everything else is fine. If you plan on keeping SPS, or honestly even LPS healthy, checking and maintaining ideal calcium and magnesium levels is a must. For the price, this is a great additive for new and experienced reefers alike.

## Features

- Liquid ionic calcium source
- 160, 000 mg/L (most concentrated on the market) vs. 100, 000 mg/L
- 100% soluble. Be wary of products that are Milky White or need to be shaken

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Seachem |
| Customer Reviews | 4.7 out of 5 stars 738 Reviews |
| Item Form | Liquid,Ionic |
| Item Weight | 0.6 Kilograms |
| Liquid Volume | 500 Milliliters |
| Manufacturer | Seachem Laboratories, Inc. |
| UPC | 015568976964 000116033305 |

## Product Details

- **Brand:** Seachem
- **Item Form:** Liquid,Ionic
- **Item Weight:** 0.6 Kilograms
- **Liquid Volume:** 500 Milliliters
- **Manufacturer:** Seachem Laboratories, Inc.

## Images

![Reef Complete 500ml - Image 1](https://m.media-amazon.com/images/I/715iiJ0uezL.jpg)

## Questions & Answers

**Q: I have an activated carbon reactor, will the reactor remove this stuff?**
A: I don't know the answer but I shut my off for a few hours.

**Q: What distinguishes this from their regular calcium additive?**
A: It's more than just calcium. It has all the elements of saltwater mixes. You use Reef Plus with this, and your saltwater tank gets the added vitamins and amino acids it needs to be healthy.

**Q: Seachem reef calcium. will it help strengthen the shell of my freshwater turtle? i have a reeve’s turtle/chinese pond turtle.**
A: Made for saltwater! Need better foods for your turtle. Pond turtles don't need calcium supplements because it's usually in the water if you do water replacements!

**Q: My calcium (159) and magnesium (870) levels are low in my nano 13.5g saltwater tank. Will this boost both or do I also need a magnesium additive?**
A: Water changes work better than anything in these smaller tanks. Is this a hard coral tank? I use Seachem Reef Complete and Reef Plus together. If its a coral tank and not a fish tank, then make sure your using a reef salt mix with those extra additives. You can also add Reef Rubble pieces to keep your levels up in between water changes. Smaller tanks need more water changes because things change quicker with less space.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quick and easy to tank of corals
*by J***N on September 6, 2025*

Good stuff to add to aquariums

### ⭐⭐⭐⭐⭐ Keep your corals happy!
*by D***. on August 28, 2015*

Works as it should, priced competitively, so whats not to like? Great for getting your calcium up with minimal solution. I use it in conjunction with the Reef Fusion 1 & 2, but this gets the calcium and magnesium up without iron that can be utilized by algae. Also it is more concentrated than the Reef Fusion 1, so it is very useful when your calcium levels take a dip and everything else is fine. If you plan on keeping SPS, or honestly even LPS healthy, checking and maintaining ideal calcium and magnesium levels is a must. For the price, this is a great additive for new and experienced reefers alike.

### ⭐⭐⭐⭐⭐ Awesome!
*by A***R on February 20, 2026*

I keep a mixed reef tank. when i started to dose my hard corals showed impressive growth.

## Frequently Bought Together

- Seachem Reef Complete 500ml
- Seachem Reef Plus 500ml
- Seachem Reef Carbonate 500ml

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-03-24*