is this something I can use for my hydroponics system? (vs. Epson Salt)

It’s the same basic thing as epsom salt, just without any anti-caking agents in it.

Is this safe for freshwater planted tanks? My calcium is much higher then magnesium and would like to increase it.

Honestly, I'm not sure. I'm a salt water guy, but I do know that you should not add buffers of any kind unless you know that they are needed. If you know what the Magnesium levels are supposed to be, you could probably use this product to correct your Mag levels, but I wouldn't do anything unless I spoke to someone at my local fish store. Be careful!

Is it supposed to have bigger chunks in the container?

There’s no anti-caking agents in it so clumps can happen. Just shake the container to break up the clumps.

Reef Advantage Magnesium 1 2 Kg 2 6 Lbs | Desertcart Saint Vincent and the Grenadines

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EC$465

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In stock

Sold byAmazon Saint Vincent and the GrenadinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Saint Vincent and the Grenadines.

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Description

🌟 Elevate your reef’s health with pure, powerful magnesium magic!

TRUSTED BY PROS - Seachem’s proven formula with 4.6-star rating from 156 reef enthusiasts
PURE CLEAN FORMULA - Zero ammonia contamination ensures safer, healthier reef environments
IONIC BALANCE MAINTAINED - Minimal disruption to natural seawater ionic ratios for stable aquarium chemistry
HIGH EFFICIENCY TREATMENT - 1.2 kg treats up to 19,200 gallons, perfect for large reef tanks
PRECISION MAGNESIUM BOOST - Restores depleted magnesium with a scientifically optimized blend for reef vitality

SeaChem Reef Advantage Magnesium is a highly concentrated, ammonia-free blend of magnesium, chloride, and sulfate salts designed to restore essential magnesium levels in reef aquariums. It treats large volumes efficiently while maintaining natural seawater ionic balance, supporting optimal pH and calcium stability for thriving coral ecosystems.

Specifications

ASIN	B001F0MMBO
Allergen Information	Abalone Free
Brand	Seachem
Brand Name	Seachem
Customer Reviews	4.6 out of 5 stars 156 Reviews
Global Trade Identification Number	00000116063708
Item Form	Liquid
Item Weight	1.11 kg
Liquid Volume	250 Millilitres
Manufacturer	Seachem Laboratories, Inc.
Target Species	Reef
UPC	000116063708
Unit Count	1 Count
country-of-origin	USA

Reviews

E**D

Works🤷🏽‍♂️like it should

8.11.2025

S**O

Consigliato

Confezione integra, prodotto arrivato prima del previsto, prezzo conveniente. Per chi ha acquari grandi la confezione da 1.2 kg è l'ideale. Consigliato

8.02.2019

M**.

Old results

3.03.2023

K**E

Cheap good aquarium Magnesium

27.10.2023

S**R

Garanzia di qualità Seachem

Facimente diluibile e utilizzabile con una pompa dosometrica

23.04.2019

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EC$465

Duties & taxes included

In stock

Sold byAmazon Saint Vincent and the GrenadinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Saint Vincent and the Grenadines.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago