---
product_id: 1627386
title: "Seachem Reef Complete 500ml"
brand: "seachem"
price: "$49.47"
currency: USD
in_stock: true
reviews_count: 13
category: "Seachem"
url: https://www.desertcart.ec/products/1627386-seachem-reef-complete-500ml
store_origin: EC
region: Ecuador
---

# Balanced magnesium & strontium for reef vitality 160,000 mg/L ionic calcium - ultra concentrated 100% soluble formula - no shaking needed Seachem Reef Complete 500ml

**Brand:** seachem
**Price:** $49.47
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate Your Reef Game with the Most Concentrated Calcium Powerhouse!

## Quick Answers

- **What is this?** Seachem Reef Complete 500ml by seachem
- **How much does it cost?** $49.47 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/1627386-seachem-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 Reef Care:** Maintains natural seawater calcium levels without altering your tank’s delicate pH balance.
- • **Balanced Mineral Support:** Includes magnesium and strontium in reef-optimized ratios to sustain coral growth.
- • **Trusted by Reef Enthusiasts:** Highly rated and competitively priced for both new and experienced reef keepers.
- • **Crystal Clear & Ready-to-Use:** 100% soluble formula ensures no milky residue or shaking—just pure reef nourishment.
- • **Ultra-Concentrated Calcium Boost:** 160,000 mg/L ionic calcium delivers rapid reef recovery without dilution.

## Overview

Seachem Reef Complete 500ml is a premium liquid ionic calcium supplement boasting 160,000 mg/L concentration—the highest on the market. Its 100% soluble, clear formula supports coral growth by restoring calcium, magnesium, and strontium levels without impacting pH. Ideal for maintaining vibrant, healthy reefs, it’s trusted by hobbyists for quick, effective tank 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 |
|---------------|-------|
| ASIN | B000256976 |
| ASIN  | B000256976 |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #32,430 in Pet Supplies ( See Top 100 in Pet Supplies ) #304 in Aquarium Water Treatments |
| Brand Name | Seachem |
| Breed Recommendation | fish |
| Color | clear |
| Country of Origin | United States |
| Customer Reviews | 4.7 4.7 out of 5 stars (734) |
| Date First Available | June 15, 2004 |
| Date First Available  | June 15, 2004 |
| Department | Unisex-Adult |
| Department  | Unisex-Adult |
| Directions | This item is used for aquarium only |
| Included Components | Seachem Reef Complete 500ml |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 6.5 x 2.5 x 2.3 inches |
| Item Package Dimensions L x W x H | 7.44 x 2.36 x 2.28 inches |
| Item Weight | 0.6 Kilograms |
| Item model number | 333 |
| Item model number  | 333 |
| Manufacturer | Seachem Laboratories, Inc. |
| Manufacturer  | Seachem Laboratories, Inc. |
| Material | Plastic |
| Model Name | Seachem Reef Complete 500ml |
| Number of Items | 1 |
| Product Dimensions  | 6.5 x 2.5 x 2.3 inches; 1.32 Pounds |
| Size | 100 mL, 250 mL, 500 mL, 2 L, 4 L |
| Specific Uses for Product | Active |
| Target Audience Keyword | fish |
| Warranty Description | Warranty |

## Product Details

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

## Images

![Seachem 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.

### ⭐⭐⭐⭐⭐ Review
*by Y***I on November 24, 2025*

Desde que uso Seachem Reef Complete, he notado un cambio muy claro en la estabilidad de mis parámetros y en la salud general de mis corales. El producto viene bastante concentrado, así que con una dosificación pequeña ya logro mantener el calcio dentro del rango ideal sin necesidad de estar añadiendo grandes cantidades todos los días. Lo que más me ha gustado es que no solo sube el calcio, sino que también aporta magnesio y estroncio, lo cual ayuda mucho a evitar la precipitación y mantiene más estables los niveles del tanque. En mi caso, mis blandos y LPS reaccionaron rápido: mejor extensión de pólipos y crecimiento más consistente. El líquido es transparente, sin olor extraño y se mezcla rápido en el agua sin dejar residuos. También agradezco que Seachem incluya las instrucciones con medidas claras según el nivel que buscas alcanzar —ideal para quienes están empezando y para quienes ya llevan tiempo cuidando un acuario de arrecife. Después de varias semanas de uso, puedo decir que es un producto confiable, económico y práctico para mantener la química del acuario en orden. Lo seguiré comprando sin duda

## Frequently Bought Together

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

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-24*