---
product_id: 7741876
title: "Seachem PhosGuard 250ml"
brand: "seachem"
price: "$546"
currency: MXN
in_stock: true
reviews_count: 8
category: "Seachem"
url: https://www.desertcart.mx/products/7741876-seachem-phosguard-250ml
store_origin: MX
region: Mexico
---

# Rapid phosphate removal Optimized water flow High-capacity porous beads Seachem PhosGuard 250ml

**Brand:** seachem
**Price:** $546
**Availability:** ✅ In Stock

## Summary

> ⚡ Clear water, zero algae—your tank’s new secret weapon!

## Quick Answers

- **What is this?** Seachem PhosGuard 250ml by seachem
- **How much does it cost?** $546 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/7741876-seachem-phosguard-250ml)

## 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 by 1,780+ users for superior phosphate management and crystal-clear water
- • **Dual Environment Use:** Effective in both marine and freshwater aquariums for versatile application
- • **Instant Algae Control:** Rapidly eliminates phosphates to starve algae growth within days
- • **Optimized Flow Design:** Bead-shaped granules ensure maximum water contact and filtration efficiency
- • **High Capacity Porosity:** Highly porous material traps more phosphates and silicates for longer-lasting results

## Overview

Seachem PhosGuard 250ml is a premium aquarium water treatment that rapidly removes phosphates and silicates from both marine and freshwater tanks. Its bead-shaped, highly porous granules maximize water flow and filtration capacity, effectively starving algae and improving water clarity. Trusted by thousands of aquarists, PhosGuard outperforms competitors to maintain pristine aquatic environments.

## Description

Phosguard rapidly removes phosphate and silicate from marine and freshwater aquaria. It is not recommended for phosphate buffered freshwater. Phosguard is highly porous for high capacity and bead-shaped for optimum water flow. It outperforms all competing products.

Review: Really works well - This will be an updated review as I just got the product last night. I have a 20 gallon tank and have been frustrated with how quickly algae seems to be growing on my 'fake' plants in the tank.. I have an algae eater but he can't get all the leaves due to their shape and size. Having phosphate test kit for the pool I decided to check the fish tank. The high mark is dark blue. I've never seen the test water such a dark blue color and I have problems with the pool in the summer due to trees overhead and the Florida climate. My fish tank water had even more phosphates than the pool ever had. So I bought this product after seeing a video on its use. I have an AquaClear 30 filter which uses the foam, purigen, biomedia stages. I took out the biomedia bag and put it beneath the intake and replaced it with the same sized bag filled with PhosGuard. It was roughly half the 250ml container I purchased here. I put it in last night around 6pm (after rinsing it well as directed) and left it. I tested the water today around 3pm and the test water was almost clear, indicating little to no phosphates in the water. It was still a little blue but nowhere near the dark blue prior to using the product. They say to wait 4 days to test the water. I'm thinking by tomorrow the test water will be clear, indicating no phosphates. I expected this result from the reviews I've read and the video I saw, but what surprised me the most was that the algae is disappearing! There are only patches of it left on the leaves and a big patch on my 3 inch round/flat bubbler. I should have taken a before picture of the algae but take my word for it. Just like the guy in the video, I had the result the following day of dying algae. It simply doesn't have anything to eat to stay alive.. and we keep the tank light on probably longer than recommended also. I'll report back in a few days on the final results but so far it's working beautifully. I was expecting to have to take all the plants out of the tank for the typical bleach soak. (i'm careful to soak them in prime or safe to neutralize any bleach before re-using). I never expected the algae to just die off. So far i'm impressed. Also I'm convinced now for this coming pool season about using PhosFree in our sand filter to control Phosphates in the pool. But that's another review. Updates to come.
Review: Simply the Best - The best product on the market to combat phosphate issues in your reef tanks, bar none!

## Features

- For marine and freshwater
- Rapidly hydrodynamics
- Removes phosphate
- age range description: all stages
- material type: cotton

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Seachem |
| Customer Reviews | 4.5 out of 5 stars 1,780 Reviews |
| Item Form | Granules |
| Item Weight | 0.55 Pounds |
| Liquid Volume | 250 Milliliters |
| Manufacturer | Seachem Laboratories, Inc. |
| UPC | 000116018609 015568976858 |

## Product Details

- **Brand:** Seachem
- **Item Form:** Granules
- **Item Weight:** 8.8 ounces
- **Liquid Volume:** 250 Milliliters
- **Manufacturer:** Seachem Laboratories, Inc.

## Images

![Seachem PhosGuard 250ml - Image 1](https://m.media-amazon.com/images/I/71YvDvPmFxL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Really works well
*by N***2 on December 24, 2014*

This will be an updated review as I just got the product last night. I have a 20 gallon tank and have been frustrated with how quickly algae seems to be growing on my 'fake' plants in the tank.. I have an algae eater but he can't get all the leaves due to their shape and size. Having phosphate test kit for the pool I decided to check the fish tank. The high mark is dark blue. I've never seen the test water such a dark blue color and I have problems with the pool in the summer due to trees overhead and the Florida climate. My fish tank water had even more phosphates than the pool ever had. So I bought this product after seeing a video on its use. I have an AquaClear 30 filter which uses the foam, purigen, biomedia stages. I took out the biomedia bag and put it beneath the intake and replaced it with the same sized bag filled with PhosGuard. It was roughly half the 250ml container I purchased here. I put it in last night around 6pm (after rinsing it well as directed) and left it. I tested the water today around 3pm and the test water was almost clear, indicating little to no phosphates in the water. It was still a little blue but nowhere near the dark blue prior to using the product. They say to wait 4 days to test the water. I'm thinking by tomorrow the test water will be clear, indicating no phosphates. I expected this result from the reviews I've read and the video I saw, but what surprised me the most was that the algae is disappearing! There are only patches of it left on the leaves and a big patch on my 3 inch round/flat bubbler. I should have taken a before picture of the algae but take my word for it. Just like the guy in the video, I had the result the following day of dying algae. It simply doesn't have anything to eat to stay alive.. and we keep the tank light on probably longer than recommended also. I'll report back in a few days on the final results but so far it's working beautifully. I was expecting to have to take all the plants out of the tank for the typical bleach soak. (i'm careful to soak them in prime or safe to neutralize any bleach before re-using). I never expected the algae to just die off. So far i'm impressed. Also I'm convinced now for this coming pool season about using PhosFree in our sand filter to control Phosphates in the pool. But that's another review. Updates to come.

### ⭐⭐⭐⭐⭐ Simply the Best
*by T***N on August 31, 2025*

The best product on the market to combat phosphate issues in your reef tanks, bar none!

### ⭐⭐⭐⭐⭐ Fish tanks need this!
*by D***W on January 17, 2026*

Great product

## Frequently Bought Together

- Seachem Phosguard Phosphate & Silicate Removal Filter Media For Freshwater & Marine Aquarium, 250Ml
- Seachem De Nitrate 500Ml, Aquarium Filter Media
- Seachem Purigen 250ml, adsorbent fresh & marine aquarium filter media to remove all impurities incl. soluble

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-02-22*