एक्वेरियम नमक और खारापन कैलकुलेटर

At 35 ppt, 35 g/L is only a theoretical baseline. Commercial salt mixes differ in composition and moisture, so use the manufacturer recommendation in g/L when available. Weigh the starting amount, dissolve it fully in a separate container, then verify salinity with a calibrated instrument.

Reef tanks are commonly kept near 35 ppt, approximately specific gravity 1.026 at 25°C. The relationship between salinity and specific gravity changes with temperature, so follow the temperature basis of your measuring instrument.

Use a refractometer or digital salinity meter. Many hobby refractometers are most accurate when calibrated with a 35 ppt / 1.026 calibration fluid (not 0 ppt). Hydrometers are cheaper but less accurate. Temperature affects readings, many refractometers are calibrated for 20°C.

No. Always dissolve salt in a separate container first. Adding undissolved salt can burn corals and fish (osmotic shock, chemical burns on gills and tissue) and cause local salinity spikes.

Displacement: rocks and sand reduce actual water volume, e.g. 80 lbs of rock in a 45‑gallon tank might leave only ~35 gal of water; dosing for 45 gal would overshoot. Salt brand: some "pro" or fortified mixes need slightly more or less weight to hit the same SG. Moisture: if the salt bag absorbed humidity, 100 g of "wet" salt has less actual NaCl than 100 g of dry salt. Always weigh with a scale and confirm with a refractometer.