---
product_id: 11604679
title: "Instant Ocean IN05305 Calcium Booster, 250-ml"
brand: "instant ocean"
price: "16.92 DT"
currency: TND
in_stock: false
reviews_count: 4
url: https://www.desertcart.tn/products/11604679-instant-ocean-in05305-calcium-booster-250-ml
store_origin: TN
region: Tunisia
---

# Safe for marine ecosystems Fast-acting formula Precise calcium boost (400-450 ppm) Instant Ocean IN05305 Calcium Booster, 250-ml

**Brand:** instant ocean
**Price:** 16.92 DT
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Elevate your reef’s vitality with instant calcium power!

## Quick Answers

- **What is this?** Instant Ocean IN05305 Calcium Booster, 250-ml by instant ocean
- **How much does it cost?** 16.92 DT with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/11604679-instant-ocean-in05305-calcium-booster-250-ml)

## Best For

- instant ocean enthusiasts

## Why This Product

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

## Key Features

- • **Instant Impact:** Quickly raises calcium levels to ideal 400-450 ppm range for reef health
- • **Optimize Reef Growth:** Supports vibrant corals, coralline algae, and clams with essential calcium
- • **Pure & Clean Formula:** Free from nitrates, phosphates, and silicates to keep your tank pristine
- • **Trusted Concentration:** Highly concentrated 250 ml bottle for long-lasting use
- • **Effortless Maintenance:** Simple dosing—5 ml per 50 gallons, no reactors or powders needed

## Overview

Instant Ocean IN05305 Calcium Booster is a concentrated 250 ml formula designed to safely and quickly raise calcium levels in marine aquariums to the optimal 400-450 ppm range. Essential for the skeletal growth of corals, coralline algae, and clams, it contains no harmful nitrates, phosphates, or silicates, ensuring a clean and healthy reef environment with easy, precise dosing.

## Description

Corals, coralline algae, clams, and other reef inhabitants need calcium for skeletal growth. concentrated formula quickly and safely raises calcium levels essential for corals, coralline algae and other reef invertebrates no nitrates, phosphates or silicates simple to use, no complicated reactors or messy powder available in 250 ml and 500 ml sizes use 5 ml per 50 gallons

## Features

- Calcium Booster Safely Increases Calcium Levels
- It is recommended to maintain free calcium levels between 400 to 450 ppm
- Use as needed to raise calcium levels in marine aquariums

## Product Details

- **Brand:** Instant Ocean
- **Liquid Volume:** 250 Milliliters
- **Item Form:** Powder
- **Manufacturer:** Instant Ocean
- **UPC:** 051378053051

## Images

![Instant Ocean IN05305 Calcium Booster, 250-ml - Image 1](https://m.media-amazon.com/images/I/81I62Eqt7DL.jpg)
![Instant Ocean IN05305 Calcium Booster, 250-ml - Image 2](https://m.media-amazon.com/images/I/318+RzF2B0L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ but works great and I will buy again
*by T***A on July 29, 2015*

This is my first purchase of the Instant Ocean marine supplements and thought I'd try it as it was cheapest when I was almost out and low on budget. After dosing and retesting, it seems to be the same concentrations as the others that are more expensive. It's a bit smaller bottle, but works great and I will buy again.

### ⭐⭐⭐⭐⭐ I've seen the results
*by S***S on May 14, 2014*

My results with this product have been Great. I will order this product again. I've been so happy with the way it instantly ups my calcium levels.

### ⭐⭐⭐⭐⭐ Five Stars
*by G***A on March 7, 2015*

i like

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**Shop now:** [https://www.desertcart.tn/products/11604679-instant-ocean-in05305-calcium-booster-250-ml](https://www.desertcart.tn/products/11604679-instant-ocean-in05305-calcium-booster-250-ml)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-18*