The Revolutionary 8.3x Seawater Concentrate ATI® Absolute Ocean is a revolutionary liquid seawater concentrate designed for maximum precision, purity, and ease of use. This 8.3x concentrated solution is the perfect alternative to traditional synthetic salt mixes, especially for nano-reefs or systems where storage and mixing speed are priorities. Simply combine with RODI water for immediate, laboratory-grade saltwater that is virtually identical to natural seawater. The Absolute Ocean Advantage True Natural Chemistry: High-precision ICP laboratory measurements ensure that all major and trace elements are perfectly adjusted. Even trace elements in the parts-per-billion (ppb) range, such as vanadium, are tuned to near-natural levels. Maximum Purity: Formulated using only pharmaceutically and analytically pure salts, ensuring a final solution free from the impurities often found in mined salt products. Perfect Homogeneity: Because it is a liquid, Absolute Ocean eliminates the "layering" or separation of elements that can occur in dry salt buckets. Every drop is identical to the last. Ready for Immediate Use: There is no "mixing time" required. Once diluted with RODI water, the solution is immediately clear and ready to be added to your aquarium. ICP Quality Control: Every batch is continuously monitored by the ATI® Lab. Users can access the specific analysis of their batch via the QR code on the packaging. Seawater Composition (at 35 PSU) Parameter Natural Seawater ATI® Absolute Ocean Alkalinity 7 °dKH 7.5 °dKH ± 0.2 Calcium 421 mg/l 421 mg/l ± 1.5% Magnesium 1,313 mg/l 1,313 mg/l ± 1.5% Potassium 408 mg/l 408 mg/l ± 1.5% Strontium 8.1 mg/l 8.1 mg/l ± 2% Iodine 64 μg/l 70 μg/l ± 4 μg/l Nitrate < 1 mg/l < 0.1 mg/l Mixing Instructions For best results, use RODI water with a conductivity of less than 5 µS/cm at room temperature. Mixing Table (Standard 35 PSU) Desired Saltwater RODI Water Absolute Ocean #1 Absolute Ocean #2 1 Liter 880 ml 60 ml 60 ml 10 Liters 8.8 L 600 ml 600 ml 1 Gallon 113 fl oz (0.88 gal) 8 fl oz (1 cup) 8 fl oz (1 cup) 5 Gallons 4.4 gal 40 fl oz 40 fl oz Application: Pour the required RODI water into a clean container, add Absolute Ocean #1 and #2, and use immediately once clear. Storage & Available Sizes Shelf Life: Absolute Ocean has an unlimited shelf life when stored properly. Temperature: Store above 10°C (50°F). If crystals form in solution #1 due to cold, gently heat to 45°C (115°F) in a water bath until dissolved. Available Sizes: 2 x 2.7 L Set: Produces 45 Liters (12 gal) of saltwater. 2 x 10.2 L Set: Produces 170 Liters (45 gal) of saltwater.