- To achieve a salinity level of 32-35 â€° (psu), dissolve 35 ml of Tropic MarinÂ® PRO-REEF per liter or approximately Â½ cup of Tropic MarinÂ® PRO-REEF per US gallon water. Dissolve almost all of the salt in a clean container already filled with the full volume of RO/DI water at a temperature of 73-77Â°F / 23-25Â°C while circulating/stirring the water. Do not concentrate the mixture by adding the full amount of salt to a smaller amount of water.
- Note: Always add the salt to the water, never the water to the salt. Making a concentrated mixture will cause a calcium carbonate precipitate to form
- When you have added ALMOST all of the salt and the mixture is fully dissolved and clear, start measuring the specific gravity with a hydrometer or similar instrument. Keep adding small amounts of salt until the specific gravity is the value you desire. The specific gravity of the sea salt solution should range from 1.025 to 1.027 (at 73-77Â°F / 23-25Â°C) and the pH-value should be in the range of 8.0 - 8.4. If all parameters are correct, the salt water is ready to use.