Aquarium and Reef Calculators


Tank dimensions
Length (in)48
Width (in)18
Height (in)24
Fill level (%)90%
Salt mix
Salinity (ppt)35
Enter your readings
Temperature (°F)
Salinity (ppt)
Specific gravity
pH
Ammonia NH₃ (ppm)
Nitrite NO₂ (ppm)
Nitrate NO₃ (ppm)
Calcium Ca (ppm)
Magnesium Mg (ppm)
Alkalinity (dKH)
Fish details
Number of fish10
Avg length (in)3
Food type
Feedings per day
Feed small portions 1–2× daily. Remove uneaten food within 5 minutes to prevent ammonia spikes.
Tank & change settings
Tank size (gal)
Change amount (%)15%
Current salinity (ppt)35
Target salinity (ppt)35
Coral type
SPS
Small polyp stony
LPS
Large polyp stony
Soft corals
Leathers, mushrooms
Mixed reef
All types combined
Tank volume
Volume (gal)75
Coral coverage (%)50%
Current parameters
Current Ca (ppm)390
Current Mg (ppm)1220
Current KH (dKH)7
Dosing & ideal parameters