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AccuraSea® Seawater Reference Solution

Do you think it’s important to maintain salinity precisely? We’re with you. That’s why we created AccuraSea Seawater Reference Solution, the only calibration solution of its kind made from real seawater. It’s pure natural sea water micron filtered and UV sterilized then adjusted with reverse osmosis water to the standard S = 35 or conductivity of 53 mS/cm at 25°C (77°F). Use it to accurately calibrate seawater refractometers and check the accuracy of swing-arm hydrometers. You may also want to use it as a reference for test kits used to measure the concentrations of various seawater components, since it is natural seawater with the correct and well-known concentrations of all dissolved salts. Packaged in 250 ml bottles.



Guaranteed, reef-safe elimination of Aiptasia Red Sea Aiptasia-X Guaranteed, Reef-Safe elimination of Aiptasia. Aiptasia-X is a unique, thick adhesive mixture that


Bactiv8 NPX

Improve water quality with Bactive8 NPX from Two Little Fishies. When used in conjunction with NPX Bioplastics or other biopellets and a protein skimmer, Bactiv8 NPX will help remove nitrate and phosphate from your reef tank.


Biopronto Marine

Use BioPronto Marine from Two Little Fishies to start the nitrification cycle in new aquariums.

Cultured microbes jump start the biological filtration process

Enhances nitrification and denitrification in heavily stocked tanks.



A two-part solution for replenishing calcium and alkalinity. Adjusts calcium, magnesium and strontium ions to Natural Seawater ratios, and achieves a balanced ionic residual.


Calcium Concentrate

Two Little Fishies Calcium Concentrate makes it easy to rapidly adjust the calcium level in an aquarium. The long-term maintenance of calcium levels is best managed with a balanced ion supplement such as Kalkwasser or Two Little Fishies C-Balance®, which maintain alkalinity in addition to calcium concentration. Use Two Little Fishies Calcium Concentrate to raise the calcium concentration when the alkalinity level is already high. In this case, Calcium Concentrate will simultaneously raise the calcium concentration and lower the alkalinity level, bringing both closer to a natural seawater ratio.


Iodine Concentrate

Iodide and iodine supplement made from potassium iodide and seaweed extracts. Use this supplement to provide an extra boost of this important element and observe the positive effects. Great for growing Xenia, other soft corals and delicate red and brown seaweeds. 250ml (8.4 fl oz) bottle.


Iron Concentrate

Two Little Fishies Iron Concentrate is a solution that contains the elements iron and manganese, which are essential to the health of all plants, including the symbiotic zooxanthellae in corals and sea anemones, and sea-grasses. Two Little Fishies Iron Concentrate safely replenishes iron and manganese in the proper ratio, which helps maintain optimum water quality for the growth of corals and the macro algae that are commonly cultivated in refugium aquariums. 250 ml (8.4 oz) and 500 ml (16.8 fl oz) bottles



Calcium Supplement Mix. Our pure source of Calcium Hydroxide makes the ideal solution for replenishing calcium and maintaining alkalinity, for corals, clams, and calcareous algae that build skeletons of calcium carbonate. It also helps maintain pH, precipitates phosphates and enhances protein skimming. Available in 1 lb bottle and 4 lb bucket.


Magnesium Concentrate

Two Little Fishies Magnesium Concentrate is a solution that contains the element magnesium, an essential pH-stabilizing component of the seawater buffering system. Magnesium is also important for the operation of various cellular enzymes, and is a key component of the pigment chlorophyll and the functioning of photosynthesis in plants.


MarineSnow® Plankton Diet

MarineSnow Plankton Diet is a first of its kind product that reproduces the special biogenic suspended matter found in natural seawater, including “marine snow” aggregates. A food for filter-feeding marine invertebrates that feed on particulate and dissolved organic matter, phytoplankton and zooplankton. Formula based on components of ocean plankton.


ODIMOR-Aquarium Munster

ODIMOR is a specialized ornamental fish treatment for velvet diseases (Oodinium, Chilodonella, Ichthybodo, Trichodina, etc.). Visible symptoms include pale grey to dark, velvet-like films or barely visible spots which, during subsequent stages, spread to the gills, fins and the entire body. The gills remain open and the fish exhibits increased respiratory activity which can reach levels of acute respiratory distress.

ODIMOR acts quickly and reliably. Treatment with odimor effectively controls parasites and quickly stops the progress of disease.