---
product_id: 265732307
title: "Reef Foundation A (Ca/Sr) - Red Sea"
brand: "red sea"
price: "€ 37.24"
currency: EUR
in_stock: true
reviews_count: 5
category: "Red Sea"
url: https://www.desertcart.it/products/265732307-reef-foundation-a-ca-sr-red-sea
store_origin: IT
region: Italy
---

# 1mL raises Ca by 2 ppm/25 gal Precise Ca/Sr blend ratio Automatic daily dosing Reef Foundation A (Ca/Sr) - Red Sea

**Brand:** red sea
**Price:** € 37.24
**Availability:** ✅ In Stock

## Summary

> 🌊 Build your reef’s future, one perfect dose at a time!

## Quick Answers

- **What is this?** Reef Foundation A (Ca/Sr) - Red Sea by red sea
- **How much does it cost?** € 37.24 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/265732307-reef-foundation-a-ca-sr-red-sea)

## Best For

- red sea enthusiasts

## Why This Product

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

## Key Features

- • **Pure & Ready:** Ultra-pure ingredients packaged for direct dosing—no mixing required
- • **Daily Foundation Boost:** Supports coral health with consistent, automatic daily supplementation
- • **Effortless Maintenance:** Ready-to-use liquid formula with included measuring cup for hassle-free dosing
- • **Optimized Coral Growth:** Blended calcium and strontium salts in coral-perfect ratios for vibrant skeletons
- • **Scientifically Formulated:** Backed by years of biological coral analysis for reef tank success

## Overview

Red Sea Reef Foundation A is a liquid supplement blending calcium and strontium salts in the exact ratio corals need to build strong skeletons. Designed for daily automatic dosing, it supports healthy coral growth and vibrant reef tanks with ultra-pure ingredients and easy-to-use packaging.

## Description

Red Sea’s CALCIUM+ contains blended salts of calcium and strontium in the ratio required by corals and is part of Red Sea’s complete Reef Care Program.Red Sea Foundation A is a component of the Red Sea Reef Foundation program for healthy and vibrant corals. Red Sea Foundation A is a blend of Calcium & Strontium salts in the proper ratio for seawater.Red Sea Reef Foundation is based from years of biological analysis of corals and what they require for growth. From their results, they have been able to formulate the Reef Foundation system for Calcium, Alkalinity, and Magnesium maintenance in reef tanks. Using ultra pure raw products, Red Sea has packaged the additives in ready to use bottles and jugs that you can dose directly out of with no mixing required.Dosing Instructions: 1mL will raise the Calcium level of 25 gallons by 2 ppm.Reef Foundation A - Calcium and StrontiumReef Foundation B - AlkalinityReef Foundation C - Magnesium

Review: bottled came cracked and was leaking in the box. Calcium all over the bottle. I hate complaining because it's probably a small business but I lost half the bottle.
Review: Love this product corals love i will keep buying

## Features

- ✅ Contains blended salts of calcium and strontium in the ratio required by corals
- ✅ Add this liquid supplement to your aquarium daily to form the basic foundation of coral skeletons
- ✅ Easy to use with automatic dosing
- ✅ Balanced proportions for coral health and growth
- ✅ Include a measuring cup for easy dosing

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004E47QSC |
| Batteries Included | No |
| Best Sellers Rank | #26,322 in Pet Supplies ( See Top 100 in Pet Supplies ) #206 in Fish Medication & Health Supplies |
| Customer Reviews | 4.7 4.7 out of 5 stars (243) |
| Date First Available | 8 August 2012 |
| Item Form | Liquid |
| Item Weight | 771 g |
| Item model number | Red Sea Reef Foundation A Supplement (Ca |
| Product Dimensions | 8 x 20 x 8 cm; 771 g |
| Quantity | 1 |
| Size | 500 ml |
| batteries required | No |

## Product Details

- **Brand:** Red Sea
- **Item form:** Liquid
- **Item weight:** 0.77 Kilograms
- **Liquid volume:** 500 Milliliters
- **Manufacturer:** Red Sea

## Images

![Reef Foundation A (Ca/Sr) - Red Sea - Image 1](https://m.media-amazon.com/images/I/81c7ZUzhmFL.jpg)

## Customer Reviews

### ⭐ Review
*by M***E on 18 May 2024*

bottled came cracked and was leaking in the box. Calcium all over the bottle. I hate complaining because it's probably a small business but I lost half the bottle.

### ⭐⭐⭐⭐⭐ Review
*by R***Y on 15 October 2025*

Love this product corals love i will keep buying

### ⭐⭐⭐⭐⭐ Review
*by A***K on 15 July 2019*

Good product. But very expensive. Powder is better

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---

*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-21*