The Refractometer offers a reliable and accurate way of determining true salinity in the aquarium and fish farm environment. Not only is it quick and easy to use but it is also very straightforward to calibrate.

The refractometer will give readings in both scales of measurement i.e. specific gravity (S.G.) and salinity (S). Automatic temperature compensation is achieved by way of a bi-metallic strip inside the rugged housing.
Before carrying out a test or series of tests, it is necessary to calibrate the refractometer. Calibration is performed by setting the zero point using pure water. For best results, it is recommended that a sample of the water used as the diluent in the fluid to be tested is used for calibration. The refractometer may then be used to determine the combination of the fluid itself.

Specially formulated for the use with reverse osmosis water

Red Sea is please to announce the addition of an innovative new salt formula designed to meet the needs of today`s advanced hobbyist. Coral Pro Salt has been specifically formulated for use with "mineral free" Reverse Osmosis, or soft tap water and contains the elevated levels of calcium and buffer capacity that provide the extended availability of these elements, essential for vibrant coral growth. Utilizing the same natural sea minerals used in Red Sea Salt the new Coral Pro Salt will enable all reverse osmosis users and reef enthusiast a superior product with out the need for immediate supplementation.

Chemically balanced formula to support the most delicate Corals and other marine life

Reaches a stable, natural pH shortly after mixing

Free of Nitrates & Phosphates

Produced by a small batch process to ensure homogeneity and consistency of the salt mixture

Corals, calcareous algae and other invertebrates use large amounts of Calcium for the building of their skeletons or shells. The Calcium level in natural seawater at 35ppt is approximately 400 ppm.

The Coral Pro formula provides elevated levels of calcium at the "lower than natural" salinities preferred in reef aquariums. Table shows Calcium levels of Coral Pro mixed in RO water at 24°C 75°F and salinity.

s.g.. Salinity Calcium Qty of Salt

1.021 30.6 ppt 420 ppm 33.4 g/l 1.4 lb/5 US gal

1.023 32.8 ppt 450 ppm 35.8 g/l1.5 lb/5 US gal

1.025 35.0 ppt 480 ppm 38.2 g/l1.6 lb/5 US gal

Instant Ocean is a complete formula that includes every necessary major, minor and trace elements blended to simulate natural seawater. Only Instant Ocean gives you every nutrient necessary for marine organism growth and development. The new, improved formula is even faster dissolving than ever.

The largest selling salt in the world.

Reef Crystals is the first enriched seawater formulation to contain an extra measure of components important to reef aquaria: calcium, vitamins and trace elements. It also has a special crystal structure that makes it the fastest dissolving salt available.

The only salt with a metal detoxifier.

Apart from being a favourite with millions of hobbyists around the world Tropic Marin® Synthetic Sea Salt is also the salt used in Tropical Marine Centre's hatchery where more than 100,000 healthy clownfish are successfully bred and raised each year.

Tropic Marin® is also the preferred salt of many of the world's leading professional institutes, hatcheries and public aquariums including "The Deep" in Hull.

• True to nature.

• Contains all 70 trace elements found in natural sea water.

• Manufactured from pure, pharmaceutical grade ingredients.

• Nitrate and phosphate free.

This new synthetic sea salt is aimed at the specific requirements of modern reef tanks: optimised calcium and magnesium concentrations promote coral growth and make it easy to care for even the most sensitive hard corals.

Tropic Marin® PRO-REEF's buffering system and pH-level have been specifically formulated to stabilise water conditions in your aquarium. This means that the KH level in your aquarium will not be affected, even when using calcium supplements.

PRO-REEF is also particularly beneficial when employing infrequent or small water changes, using RO water for making up a seawater mix.

Bio Actif Salt

The revolutionary new synthetic sea salt which combines maximum purity in terms of its componants with the protective and growth-promoting action of bioactive substances naturally found in the sea. They form effective protection for the mucous membranes of the fish whose improved health is clearly reflected in their increased levels of mating and reproduction behaviour.

Corals respond by displying even brighter and more vibrant colours. The extent to which both stony and leather corals enlarge and open their poylps is unprecedented. Indications of the improved conditions seen in the corals are greater growth and stronger tissue. They build up reserves which strengthen them and make them less sensitive to unavoidable fluctuations in their surrounding conditions.

At the same time BIO-ACTIF SEA SALT encourages the breakdown of pollutants in the water which is evident in the brilliant clarity of the water after every water change. Regular use of BIO-ACTIF SEA SALT maintains optimised conditions at a consistant level over the long term.

It is never too early to add Tropic Marin BIO-ACTIF SEA SALT to the aquarium to get the added benifits. If added at the set up process it will guarantee healthy microbiological development from the outset and the best possible preparation of the water before the aquarium is stocked with fish and corals. This effect is revived and prolonged each time the water is changed. Changing upto 15% of the water weekly on a weekly basis will sustain the quality of the water at a level which is conductive to the well-being of fish, corals and other invertibrates.

H2Ocean Pro+ is a new pro formula aquarium salt - produced by a solar evaporative process which produces a totally natural base salt where all of the main and trace elements are in complete balance as nature intended.

The pure natural salt is then specially enhanced for aquarium use by elevating specific elements that over time become depleted, such as calcium and magnesium which are used by corals and coralline algae for growth.

The formulation for H2Ocean+ salt has been developed by D-D following many months of testing and evaluation. The salt is designed to dissolve quickly and easily and to have a specific chemistry which in our opinion is the optimum formulation to maintain a healthy reef and allow regular water changes whilst maintaining a natural balance.

Calcium and Magnesium levels are boosted to replace that used up through coral growth within the aquarium whereas chloride levels are slightly lowered to allow post additions of calcium and magnesium chloride with a minimized affect on the chloride balance.

Reef Excel® Lab Marine Salt

Reef Excel® laboratory marine salt is the consistent further development of hw sea salt tested for many decades. In its composition, this sea salt is based on the latest international marine biological findings as well as analyses, and contains traces and bio elements in quantities which are identical to those in natural sea water. In regular intervals, Reef Excel® is examined for constant quality and composition by an independent testing laboratory accredited in keeping with German/European standard DIN EN 45001. Produced and analysed in keeping with the criteria for quality management in conformity with ISO 9000ff, Reef Excel® will dissolve crystal clear and free from residue within a very short period of time.

( 8 & 20KG'S Delivered in a box, Not bucket as Shown )

Great Price !!