---
product_id: 10632929
title: "Sea Calcium for Aquarium, 8-Ounce"
brand: "fluval"
price: "$34.13"
currency: USD
in_stock: true
reviews_count: 11
category: "Fluval"
url: https://www.desertcart.ec/products/10632929-sea-calcium-for-aquarium-8-ounce
store_origin: EC
region: Ecuador
---

# Maintains ionic balance in marine tanks 10 mg/L weekly calcium dose USP grade pure calcium chloride Sea Calcium for Aquarium, 8-Ounce

**Brand:** fluval
**Price:** $34.13
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate your aquarium’s ecosystem with pure, powerful calcium – because your corals deserve the best!

## Quick Answers

- **What is this?** Sea Calcium for Aquarium, 8-Ounce by fluval
- **How much does it cost?** $34.13 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/10632929-sea-calcium-for-aquarium-8-ounce)

## Best For

- fluval enthusiasts

## Why This Product

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

## Key Features

- • **Ionic Harmony:** Chloride-based calcium preserves delicate marine ionic balance for thriving ecosystems
- • **Long-Lasting Supply:** Generous 8-ounce bottle ensures consistent dosing for over a year in small to medium tanks
- • **Pure & Clean Formula:** Uses only USP grade calcium chloride, free from nitrates, phosphates, and contaminants
- • **Versatile Application:** Ideal for both marine and freshwater tanks, promoting strong shells and skeletal health
- • **Precision Calcium Boost:** Delivers 10 mg/L calcium weekly to support vibrant coral & invertebrate growth

## Overview

Fluval Sea Calcium is a concentrated, USP grade calcium chloride supplement designed to deliver 10 mg/L of calcium weekly, supporting healthy coral and invertebrate skeletal growth without disrupting marine ionic balance. Free from unwanted contaminants, it’s perfect for maintaining optimal calcium levels in both marine and freshwater aquariums, ensuring vibrant aquatic life and long-term tank health.

## Description

Fluval Sea Calcium is a concentrated form of calcium that is easily absorbed by corals and other invertebrates for a strong skeletal structure, while not affecting the delicate ionic balance in marine aquariums. Regular dosing is strongly recommended to offset constant depletion by coral, coralline algae and other invertebrate growth. Fluval Sea Calcium is provided in the form of Calcium Chloride, a preferred compound as chloride is the most common ion found in marine water and inherently this will avoid unbalancing ionic ratios. Fluval Sea Calcium supplement uses only USP grade calcium chloride. This ensures pure product and the absence of any unwanted contaminants.

Review: Great product for mystery snails - I love this! it's a lot easier and less messy than attempting to add cuttle bone....or coral. coral raises your pH which i did not want. i prefer keeping my pH around 7.4-7.6 without using buffering agents. at first i was really concerned about how much to add. i'm adding this to 5 gallon Fluval Spec V. i took the directions on the bottle (designed for larger volume tank) and divided those numbers to get 1.25ml as an initial dose per 5 gallons...this raised my gH from about 4-5 to about 10-11. now i just measure my gH after my weekly water change and adjust how much i add....sometimes it's 10 drops which is .5ml or sometimes it 1ml, 20 drops...i was really concerned about how much to add at first. and i was scared i'd overdose it. turns out overdosing calcium isn't too much of a concern....if you're water column can not absorb more calcium it will start to 'scale up' your tank walls, filters....i've been using this a month and haven't run into that. but i monitor my parameters daily. and i do not guess dose this without a gH reference. my mystery snail is growing and continues to grow. unfortunately, his shell wasn't in too great of shape when i got him a few months ago. i consider him a rescue. i suspect he was kept in low pH water and didn't have access to sufficient calcium. he has grown a very large section of 'new shell' since i've gotten him. and it looks great!! so that tells me my decision to buy this for my Freshwater tank....was a very smart decision. it's very thick and will drop straight to the bottom of your tank when you add it. i pour it into the filter pump section, so it'll all get dispersed evenly. or i will just pour it over the bubbler. you do need to be aware of your gH before and after you've added this calcium. just pick up the gH kit from API right along with this...or even better, they have one specifically for calcium. some fish don't like hard water....this will harden your water. the gH of your water is made up of calcium and magnesium. it is possible your water has sufficient calcium in it without even adding this. you will not know this unless you test.. i choose to add this product because of how my snails shell was when i bought him. also, i have not noticed any change in my pH due to calcium.... test your water! follow the directions on the bottle calculated for your tank's volume....and then adjust that amount when you're doing water changes, when your gH is lowering....you will be fine. also, the bottle is huge....it'll last me about a year if i am adding this to my 5 gallon tank at whatever dosage i choose for well over a year.
Review: Great Calcium Source for Mystery Snails Shells - Great product really helped my mystery snails

## Features

- Concentrated form of calcium that is easily absorbed by corals and other invertebrates
- Supports growth and condition of corals and other invertebrates
- Uses only USP grade calcium chloride
- Contains no gluconates, nitrates, phosphates
- Free of unwanted contaminates

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B006K0Z0MC |
| ASIN  | B006K0Z0MC |
| Best Sellers Rank | #134,206 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,223 in Aquarium Water Treatments |
| Brand Name | Fluval |
| Customer Reviews | 4.7 4.7 out of 5 stars (114) |
| Date First Available | December 9, 2011 |
| Date First Available  | December 9, 2011 |
| Department | Conditioners & Additives |
| Department  | Conditioners & Additives |
| Directions | Add 5 mL per 75 L (20 US Gal) once a week. Weekly dosage provides 10 mg/L of calcium. Regular calcium supplementation is strongly recommended. Maintain calcium levels between 400 – 450 mg/L. |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 2 x 2 x 7 inches |
| Item Package Dimensions L x W x H | 6.93 x 1.85 x 1.81 inches |
| Item Weight | 12.16 ounces |
| Item model number | A8257 |
| Item model number  | A8257 |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Manufacturer  | Rolf C. Hagen (USA) Corp. |
| Manufacturer recommended age  | 1 month and up |
| Number of Items | 1 |
| Product Dimensions  | 2 x 2 x 7 inches; 12.16 ounces |
| Size | 8-Ounce |
| Style | Classic |
| Target Audience Keyword | fish |

## Product Details

- **Brand:** Fluval
- **Item Form:** Stick
- **Item Weight:** 12.16 ounces
- **Liquid Volume:** 8 Fluid Ounces
- **Manufacturer:** Rolf C. Hagen (USA) Corp.

## Images

![Sea Calcium for Aquarium, 8-Ounce - Image 1](https://m.media-amazon.com/images/I/51nTpDBL1nL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product for mystery snails
*by K***E on October 3, 2018*

I love this! it's a lot easier and less messy than attempting to add cuttle bone....or coral. coral raises your pH which i did not want. i prefer keeping my pH around 7.4-7.6 without using buffering agents. at first i was really concerned about how much to add. i'm adding this to 5 gallon Fluval Spec V. i took the directions on the bottle (designed for larger volume tank) and divided those numbers to get 1.25ml as an initial dose per 5 gallons...this raised my gH from about 4-5 to about 10-11. now i just measure my gH after my weekly water change and adjust how much i add....sometimes it's 10 drops which is .5ml or sometimes it 1ml, 20 drops...i was really concerned about how much to add at first. and i was scared i'd overdose it. turns out overdosing calcium isn't too much of a concern....if you're water column can not absorb more calcium it will start to 'scale up' your tank walls, filters....i've been using this a month and haven't run into that. but i monitor my parameters daily. and i do not guess dose this without a gH reference. my mystery snail is growing and continues to grow. unfortunately, his shell wasn't in too great of shape when i got him a few months ago. i consider him a rescue. i suspect he was kept in low pH water and didn't have access to sufficient calcium. he has grown a very large section of 'new shell' since i've gotten him. and it looks great!! so that tells me my decision to buy this for my Freshwater tank....was a very smart decision. it's very thick and will drop straight to the bottom of your tank when you add it. i pour it into the filter pump section, so it'll all get dispersed evenly. or i will just pour it over the bubbler. you do need to be aware of your gH before and after you've added this calcium. just pick up the gH kit from API right along with this...or even better, they have one specifically for calcium. some fish don't like hard water....this will harden your water. the gH of your water is made up of calcium and magnesium. it is possible your water has sufficient calcium in it without even adding this. you will not know this unless you test.. i choose to add this product because of how my snails shell was when i bought him. also, i have not noticed any change in my pH due to calcium.... test your water! follow the directions on the bottle calculated for your tank's volume....and then adjust that amount when you're doing water changes, when your gH is lowering....you will be fine. also, the bottle is huge....it'll last me about a year if i am adding this to my 5 gallon tank at whatever dosage i choose for well over a year.

### ⭐⭐⭐⭐⭐ Great Calcium Source for Mystery Snails Shells
*by H***S on January 9, 2025*

Great product really helped my mystery snails

### ⭐⭐⭐⭐⭐ Happy snails!
*by S***L on February 26, 2018*

I've been using this once a week as an additive in my fresh water aquarium as a calcium supplement for my mystery snails. I began feeding them algae tablets and giving them the calcium a few months ago. Since then I have not had any issues with brittle shells, nor have I had any casualties. They have actually increased in activity and been breeding more frequently too. Very very happy thus far with this calcium additive!

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ec/products/10632929-sea-calcium-for-aquarium-8-ounce](https://www.desertcart.ec/products/10632929-sea-calcium-for-aquarium-8-ounce)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-03-10*