Email Sign-Up Go to Shopping Cart (0)



Customer Service

Reef Additive Guide

Drs. Foster & Smith Educational Staff
Aquarium Chiller Selection Guide 
Aquarium Chillers: How to Keep Water Temperature Consistent 
Reef Keeping
Fluval Reef Aquarium Set
Fluval Reef Aquarium Set
As low as $539.99
Aquaforest Probiotic Reef Salt
Aquaforest Probiotic Reef Salt
As low as $47.99
Seneye Reef Pack
Seneye Reef Pack
As low as $469.99

Reef additives or supplements are specialized products that offer an extremely convenient way to replenish elements depleted through normal biological processes.

However, before beginning any supplementation regimen, always test your aquarium for the particular element you wish to supplement to establish a base line. Furthermore, test, monitor, and record aquarium parameters before, during, and after supplementation. By doing so, you will develop a strong command over how supplementation affects your particular system.

Reef Additives

Buffering Agents or Buffers is a broad term used to describe substances that maintain stable pH by resisting acidification that can contribute to change in pH. Through the use of buffers, alkalinity should be kept between 8 and 12 dKH to maintain stable pH AND proper calcium levels.

Calcium is one of the most important elements for thriving reef aquariums. Availability of calcium supports the healthy growth of coral skeletons. Calcium levels should be kept between 400 ppm and 450 ppm.

plays an important role in maintaining the correct balance between calcium and alkalinity in seawater. It helps stabilize alkalinity and calcium levels by preventing excess precipitation of calcium and bicarbonate. Maintain magnesium levels between 1,250 and 1,350 ppm.

Strontium along with calcium and magnesium, plays an important role in encouraging rapid growth of corals and other reef-building invertebrates. Maintain strontium levels between 8 and 14 ppm.

Molybdenum along with strontium plays an important role in the proper development of reef-building organisms. It is a trace element found in natural seawater at a concentration of about 0.010 ppm.

Iron is a trace element that provides added nourishment to all plants, macroalgae and symbiotic algae found in photosynthetic corals and sea anemones. Maintain iron levels between 0.1 and 0.3 ppm.

Potassium is an important component of aragonite, the mineral secreted as skeletal material by corals and other reef-building organisms. Maintain potassium levels between 390 and 410 ppm.

Iodine & Iodide is an element important for the health of fish, macroalgae, crustaceans, soft and hard corals and other reef-building organisms. In corals, iodine helps prevent coral bleaching by detoxifying excess oxygen produced by symbiotic zooxanthellae algae exposed to excessive light. Maintain iodine levels between 0.06 and 0.10 ppm.

Trace Elements help facilitate enzymatic and vitamin synthesis reactions in plants and animals to support vigor, color, and long-term growth and health. Use as directed.

Discover how reef supplements can help your reef aquarium. If you're not completely satisfied with any product you purchase from us, we'll refund your money. No questions asked. That's our 100% Satisfaction Guarantee!
Neutral Regulator Drs. Foster & Smith Calcium Chloride Drs. Foster & Smith Magnesium Sulfate Seachem Reef Strontium Kent Marine Strontium and Molybdenum
Kent Marine Iron & Manganese Potassion Lugol's Solution Kent Marine Essential Elements
Click here for a more printer-friendly version of this article.  
Click here for a pdf version of this article.  


Contact us
8 am - 8 pm CST
7 days a week

7 am-8 pm, CST
7 days a week