No powdery mess, no extra Strontium required. Just shake and add a couple of capfuls to a gallon of freshwater and presto you have "KALKWASSER". If you use KALKWASSER this makes it a breeze to prepare. You can use it all. It contains only pure Calcium and Strontium in the proper ratio just like you find in natural ocean water. Each bottle can make more than 30 gallons of KALKWASSER at half saturation. It is available in 16 ounce (473ml) bottles.

Natural oceanic Aragonitic Calcium available in a bottle. NatuReef®’s liquid Aragonite is the ideal Calcium replacement. It's not man-made. It was actually made by coral polyps just like the ones in your tank. All we’ve done is reliquified it. Can you think of a better additive to replace lost Calcium than that? Besides, it’s not just Calcium. It’s also all the other elements the corals pulled out of the water as they grew. All those trace elements are now available for new corals to grow. Your corals to grow. Each bottle contains enough natural oceanic aragonitic Calcium to grow a quarter pound of coral skeleton. That’s quite a chunk of coral. Liquid Aragonite is available in 16 ounce (473ml) bottles.

The natural oceanic Calcitic Calcium available in a bottle. This Calcium replacement is second only to Liquid Aragonite. It was made by mollusks. They spend a lifetime collecting calcite to build their shells. We made it available again in liquid form. Better than any synthetic calcium supplement since it’s all natural and includes trace elements the living mollusks deposited in their shells. There is enough Calcitic Calcium in each bottle for a Tridacna clam to put on 100 grams of shell weight. Liquid Calcite is available in 16 ounce (473ml) bottles.

Reef Former Powder is available in 150 and 300 gram jars in both Reagent (Pure) and Technical (Almost pure) grade.

Super concentrated 2 part Calcium additive.

The NatuReef® Alkalinity Plus and Hardness Plus provide 9,500 mequ. of alkalinity and almost 200,000 mg of calcium hardness per gallon. Along with these major anions and cations are also chlorides, sodium, sulfates, borates, lithium, magnesium, bromides, fluorides, bicarbonates, strontium, potassium and barium. All the elements are in proportion so they will not alter the chemical ratios in seawater. Only a slight increase in salinity may be experienced if there is little skimmer effluent waste.

Note: Make sure that both alkalinity and hardness are dispensing simultaneously. If for some reason only one solution is dispensing the other must be added manually to maintain the proper chemical ratios. The hardness solution may be added quickly, but the alkalinity must be added very slowly to prevent spontaneous precipitation and excessively high pH. These solutions differ from other two part calcium boosters on the market because they are scientifically formulated to provide the ultimate balance of ions in your aquarium. NatuReef® Hardness and Alkalinity Solutions are also very concentrated solutions. A little goes a long way. These solutions are so concentrated that they can produce 2.5 lbs of coral growth per gallon!

We strongly recommend adding these solution to your aquarium slowly and in a controlled manner. The best method is to automatically dispense the solution using a solution feeder. The SF-2 Solution Feeder is the ideal way to add these solution. Click here to learn more about the SF-2 solution Feeder.

This mini lab contains all the necessary equipment to determine the total hardness and Magnesium level in your aquarium.  This mini lab contains a table that allows the determination of the Magnesium concentration from the total hardness measured at the nominal seawater Calcium level and also the Magnesium concentration at different Calcium concentrations.  The Magnesium concentration is an often overlooked and very important element for the successful marine aquarium.  Find out where your system stands and correct your Magnesium concentration before it deviates from natural seawater.