---
product_id: 290108657
title: "Seachem Prime Fresh and Marine Aquarium Water Conditioner, 500 ml"
brand: "seachem"
price: "€ 71.32"
currency: EUR
in_stock: true
reviews_count: 13
category: "Seachem"
url: https://www.desertcart.hr/products/290108657-seachem-prime-fresh-and-marine-aquarium-water-conditioner-500-ml
store_origin: HR
region: Croatia
---

# Rapid ammonia & nitrite detox Concentrated 500 mL formula Long-lasting, economical dosing Seachem Prime Fresh and Marine Aquarium Water Conditioner, 500 ml

**Brand:** seachem
**Price:** € 71.32
**Availability:** ✅ In Stock

## Summary

> 💧 Keep your tank pristine and your fish thriving—because your aquatic ecosystem deserves the prime treatment!

## Quick Answers

- **What is this?** Seachem Prime Fresh and Marine Aquarium Water Conditioner, 500 ml by seachem
- **How much does it cost?** € 71.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/290108657-seachem-prime-fresh-and-marine-aquarium-water-conditioner-500-ml)

## 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

- • **Trusted by Experts:** Top-rated with 4.7 stars from over 2,200 aquarists who demand the best for their aquatic life.
- • **Versatile Use Case:** Perfect for fresh and marine tanks, pond setups, and during critical tank cycling phases.
- • **Allergen-Free & Safe:** Formulated without allergens or harmful additives, ensuring peace of mind for you and your fish.
- • **Ultimate Water Detox:** Neutralizes harmful ammonia and nitrites instantly for a thriving aquatic environment.
- • **Economy Meets Efficiency:** Small doses go a long way—500 mL bottle supports multiple water changes without breaking the bank.

## Overview

Seachem Prime is a premium 500 mL water conditioner designed to detoxify ammonia and nitrites rapidly in both fresh and marine aquariums. Trusted by thousands of aquarists, it supports healthy aquatic life through efficient, economical dosing and is allergen-free for safe use.

## Description

Directions Use at start-up, whenever adding or replacing water, during tank cycling, and to alleviate ammonia/nitrite toxicity. Add the recommended amount to the aquarium or pond according to the size and needs of the aquatic life.

Review: Great but smells bad - I have kept fish for over 10 years and this is my favourite water conditioner I have tried. Only need a small amount for water changes so the bottle goes a long way. Only thing is it does smell like rotten eggs so if you have a sensitive nose this might not be for you. The smell does disparate after 10 minutes or so.
Review: So good - Its so good, kept my tank nice and healthy, lasted me a long time.

## Features

- Seachem Prime Fresh And Marine Aquarium Water Conditioner, 500 Ml
- Brand : Seachem
- Product Type : Aquarium Pond Water Treatment
- Color: Size: Multicolored
- Size : 500 Ml

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B010UNMS9M |
| Allergen Information | Allergen-Free |
| Batteries Included | No |
| Batteries required | No |
| Best Sellers Rank | 17,751 in Pet Supplies ( See Top 100 in Pet Supplies ) 204 in Aquarium Water Treatments |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,294) |
| Date First Available | 20 Sept. 2019 |
| Item Form | Liquid |
| Item Weight | 567 g |
| Item model number | SE0433 |
| Product Dimensions | 16.76 x 5.84 x 6.35 cm; 566.99 g |
| Quantity | 1 |
| Size | 500 mL |

## Product Details

- **Brand:** Seachem
- **Item form:** Liquid
- **Item weight:** 1.25 Pounds
- **Liquid volume:** 500 Millilitres
- **Manufacturer:** Seachem

## Images

![Seachem Prime Fresh and Marine Aquarium Water Conditioner, 500 ml - Image 1](https://m.media-amazon.com/images/I/81aLONkZHPL.jpg)

## Questions & Answers

**Q: Can this product be used in a tank with water snails in it?**
A: I am not sure the type of snail you have but I have snails in my 75 gallon discus tank which is fresh water and I have used Prime for many years without problems.

**Q: I guess I should have asked if this contains Sulphur , thus the smell, or sulfites of any description?**
A: The label states it contains complexed hydrosulfite salts

**Q: how long is the expiration date of prime after opening?**
A: Am new at the hobby, but i didn’t see in the bottle that has a expiration date. And with my 75 galon to cylcle the tank you supposed to add for 7 days with stability to maintain amonia down and stability to help grow bacteria the size I bought goes fast.. pluse water change weekly.. ( let me tell you, is a good product.)

**Q: What are the ingredients?**
A: It is written in the bottle.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great but smells bad
*by A***R on 31 October 2025*

I have kept fish for over 10 years and this is my favourite water conditioner I have tried. Only need a small amount for water changes so the bottle goes a long way. Only thing is it does smell like rotten eggs so if you have a sensitive nose this might not be for you. The smell does disparate after 10 minutes or so.

### ⭐⭐⭐⭐⭐ So good
*by A***R on 5 November 2024*

Its so good, kept my tank nice and healthy, lasted me a long time.

### ⭐⭐⭐⭐⭐ Great Value
*by S***M on 6 September 2025*

This was recommended to me by a fellow tropical fish keeper. It's pricey, but a great broad-spectrum water-safe liquid. It smells of sulfur, but that is normal. You only need a tiny bit, so the bottle lasts for ages. 1ml per 40L of tank water.

## Frequently Bought Together

- Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 16.9 fl. oz
- Seachem Stability Fish Tank Stabilizer - For Freshwater and Marine Aquariums, 16.9 Fl Oz (Pack of 1)
- Seachem StressGuard Slime Coat Protection - Stress and Toxic Ammonia Reducer 500 ml

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-23*