Great Aquariums Start Here
Live Chat Support
    Free Shipping
  • FREE Shipping ON $75+
  • 14-Day Low Price Guarantee
  • Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
99% of items we carry qualify for FREE SHIPPING in the contiguous United States if you spend $75 or more. Learn More
If you find a product we sell for a lower price at another online store, we will match their price to ensure you always pay the lowest amount when you shop with us. Learn More
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 2 pm EST ship the same day! Learn More
Home » Saltwater Aquarium Supplies  » Calcium Reactors  » Reactor Media  »  Two Little Fishies ReMag
Two Little Fishies ReMag

Two Little Fishies ReMag

Average Rating 5 1
Write A Review
Product Review
We value your opinion & experience
Thank you for taking the time to review our products!

This is a Product Review for: Two Little Fishies ReMag
Name to display on the review:
Location (ex: Anaheim, CA):
Your experience level:
How would you rate this product?
Review Title:
Write your review:
(Please focus on product quality and performance)
Item #:
Please make a selection
From $22.99
Notify Me
Just enter your email address below and we'll let you know when the product you are looking for becomes available!

Item Code:
Your Email:
Add to Cart or Notify Me
This item is temporarily unavailable but will be back in stock soon.

Item #
Click the Add To Cart button below if you'd like to reserve this item today. Any other items included in your order will be immediately processed and shipped. We will ship this item separately as soon as it arrives. We will not charge you for this item until it ships and you will incur no additional shipping charges.
Enter your email address in the field below and click the Notify Me button if you'd like us to send you an email when this item becomes available. Although you will be immediately notified when we have stock on hand, we will not reserve any units for you; you must return to our website and place an order.

+ Add to Wishlist
Add to Wishlist
Select Wish List:
Comments (up to 200 characters):
Quantity Desired:
Quantity Received:
If you find a product we sell for a lower price at another online store, we will match their price to ensure you always pay the lowest amount when you shop with us.

Enter the price, shipping cost and website address where you found the lower price. Then click the "Add to Cart" button. We will review the lower price while processing your order and make any necessary reductions before your order ships. Some restrictions apply. See Terms & Conditions.
Shipping Cost*
Competitor's Website*
*Required information
Marine Depot 60-day Returns
At Marine Depot, we stand behind our products. That is why we offer a 60-day return period: one of the best in the industry! Learn More

Two Little Fishies ReMag Information

TwoLittleFishies ReMag is their new magnesium-rich media for use in calcium reactors. Use ReMag with ReBorn at a ratio of 1 part ReMag to 9 parts ReBorn to maintain the calcium, magnesium, and alkalinity levels in your reef aquarium water.

ReMag is composed of extremely pure and soluble granules rich in magnesium carbonate. When used in a calcium reactor, ReMag gradually replenishes magnesium and carbonate alkalinity, perfect for maintaining the magnesium concentration and alkalinity in a reef aquarium.

Rinse ReMag briefly in tap water. Add ReMag to a calcium reactor at a ratio of 10% ReMag by volume to 90% ReBorn (or other aragonite media for calcium reactors) to replenish the calcium, magnesium, strontium and carbonate alkalinity that corals and coralline algae utilize to form their skeletons. Used as directed, ReMag easily maintains the ideal magnesium concentration of 1280 - 1300 mg/l in marine aquariums at a salinity of 1.025 - 1.026. If the magnesium concentration is lower than ideal, increase it first by using Two Little Fishies Magnesium Concentrate or Magnesium Pronto. After achieving a level of about 1300 mg/l, use ReMag in a calcium reactor to maintain the concentration. The coarse size of ReMag (5 - 10 mm) allows for unrestricted water flow and easy diffusion of carbon dioxide, for maximum efficiency and easy maintenance of the reactor. ReMag is soluble at a pH of 6.5. Even at typical aquarium pH values it is slightly soluble, so ReMag can be used in a sandbed to help maintain the magnesium level in the water. ReMag does not add chloride or sulfate ions that disturb the ionic balance of the water. Top off the reactor with more ReMag as needed. If ReMag does not maintain the magnesium concentration, do not reduce the pH inside the calcium reactor. Simply increase the ratio of ReMag:Reborn, but do not exceed 25% ReMag by volume as it could raise the alkalinity too high.

Contents: calcium magnesium carbonate

Manufacturer Info

Two Little Fishies
Two Little Fishies, Inc. was founded in 1991 to promote the reef aquarium hobby with its introductory video and books about reef aquariums. The company now publishes and distributes the most popular reef aquarium reference books and identification guides in English, German French and Italian, under the d.b.a. Ricordea Publishing.

Two Little Fishies ReMag Reviews

Average Rating
(1 reviews)
Sort Reviews By:

Awesome product

Reviewers Rating Excellent!

Posted: 6/23/2016 from GARDNERS, PA UNITED STATES
5.0 5
Experience Level: Expert

Comments: I have run a calcium reactor for years using reborn from two little fishies. When I saw this I figured why not try it and not have to dose mag anymore. I checked my mag for about a month after starting remag and it has stayed the same. No fluctuations at all a steady 1400. It didn't arrive all crushed and powdery and it's a nice course media. I would strongly recommend ReMag if your running a calcium reactor. You already have the reactor so why not. No more dosing for me. Try it! You won't be disappointed

Did you find this review helpful? Yes No

Please make a selection 
WIN A MEDIA REACTOR! Sign up for hot deals, helpful videos, and a chance to win an Accel Aquatics FR-30 Media Reactor!