1-800-566-3474

Seachem Laboratories Reef Advantage Magnesium - 1 Kilograms

Read 21 Reviews Write a Review

In Stock: Order by 2PM EST for same-day shipping (M-F)

This item is in stock in our East and West Coast warehouses

$11.99 $14.99
You Save: $3.00 (20%)


SC1515

Add to Wishlist

SHIPS FREE!

Seachem

SeaChem Reef Advantage Magnesium is a concentrated (80,000 ppm) optimized blend of magnesium, chloride, and sulfate salts designed to restore depleted levels of magnesium with minimal impact to the ionic ratios found in natural sea water. Reef Advantage Magnesium contains no ammonia! This is a common contaminant in every liquid magnesium supplement on the market. Severely depleted levels of magnesium (below 800 mg/L) can cause depressed pH levels and an inability to maintain proper calcium levels. Magnesium depletion is commonly associated with the use of kalkwasser. 1 kg treats 16,000 L (4,000 gallons).

Reef Chemistry Calculator
Use our chemistry calculator to find out how much you need to add to your aquarium.


Product Manuals & Documentation

Seachem Laboratories Reef Advantage Magnesium - 1 Kilograms

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

Seachem
Seachem Laboratories, Inc. was established in 1980 by Dr. Leo G. Morin. Seachem moved into a state of the art 110,000 square foot facility in Madison, Georgia marking their 25th anniversary in the industry in 2005. This facility includes production and research laboratories, manufacturing, inventory, shipping, and office space.

21 Reviews

SHANE DIXON from SAN PEDRO, CA UNITED STATES

10/07/2015

Experience Level: Expert

great value

I have a 200 gal reef Great value for your money

Was this review helpful?

AARON LEE from SEATTLE, WA UNITED STATES

02/04/2012

Experience Level: Intermediate

one of the best

Love this product! Wouldn't switch for any brand. Excellent price.

Was this review helpful?

GARY MAREK from AUSTIN, TX UNITED STATES

03/13/2011

Experience Level: Intermediate

Does the job

A lot of reefers, especially when first starting out, don't realize the importance of magnesium. They hear calcium & alkalinity so much, they don't realize proper magnesium levels are crucial to help keeping your tank stable. If you are seriously deficient in magnesium, it is going to take a LOT of this supplement to raise your levels. I fill a bucket with R/O water, put a cup or so of the crystals in, drop a powerhead in to help dissolve the crystals for about 15-30 minutes, then add the mix to the tank. Seachem products have never let me down. Just remember, if you have a big tank and need to raise your levels up to 1300+, the biggest container (4L) is the best bang for your buck.

2 out of 2 found this review helpful

Was this review helpful?

JOSEPH MODZELEWSKI from LEXINGTON, SC UNITED STATES

11/18/2010

Experience Level: Intermediate

Measure before adjusting Mg

Be sure to order a magnesium test kit with the supplement. I bought the salifert kit and found it easy to interpret with highly reproducible results. You will use a lot of magnesium to get small bumps in the tank's magnesium level, but being in ionic balance has made my pH much easier to maintain. I needed to bring my magnesium level up ~300ppm, which took a lot of supplementation, but maintaining the new level has been easy since I switched to Seachem calcium supplement with maintenance levels of magnesium in it.

Was this review helpful?

GABRIEL CRUZ from RENO, NV UNITED STATES

07/28/2010

Experience Level: Intermediate

Economical

Way more economical than buying liquid solutions, and also raises calcium faster than ESV Magnesium.

1 out of 1 found this review helpful

Was this review helpful?

JOSEPH GONZALEZ from Cape Coral, FL UNITED STATES

07/15/2010

Experience Level: Intermediate

Best bang for the buck

Good product, good value. I mix up a gal @ a time and dose everyday automatically with a timer.

1 out of 1 found this review helpful

Was this review helpful?

Rsf from EL CAJON, CA UNITED STATES

02/06/2010

Experience Level: Intermediate

Good product

inexpensive and works great. I bought the largest container for the best value. A pain in butt though to get the lid off.

Was this review helpful?

GREGORY LEONARD from DOUGLASVILLE, GA UNITED STATES

01/12/2010

Experience Level: Expert

Great Product

Easy to use for the beginner as well as the advanced or expert user

Was this review helpful?

SlvrSurfRidr from SANTA MONICA, CA UNITED STATES

09/21/2009

Experience Level: Expert

Good bang for the buck!

Got this about a week ago - has taken a few days of dosing to see any movement, but I'm hopeful that with small dosing increases my levels will reach their optimum. good bang for the buck on this product and of course the standard marinedepot.com speedy delivery and processing.

Was this review helpful?

DAVID BROWN from KENT, WA UNITED STATES

09/15/2009

Experience Level: Expert

Seachem Lover

By adding Seachem Reef Advantage Magnesium I can now maintain proper balance, and my Coraline algae growth rate has tripled.

Was this review helpful?