Calculators

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• Effect of Water Changes Calculator
  - Estimate the effect of repeated water changes on the concentration of a given substance.
  
  
• Effective Water Change Calculator
  - Estimate the effective water change amount of several combined smaller water changes.
  
  
• Electrical Consumption Calculator
  - Estimates the electrical consumption of an aquarium system in kilowatt-hours.
  
  
• Heater & Chiller Sizing Calculator
  - Estimate the size (power) of heater and chiller required to maintain an aquarium within a specified temperature range.
  
  
• Manual pH Calibration Calculator
  - Attempts to correct the pH reading of an uncalibrated, uncalibratable, or improperly calibrated digital pH meter.
  
  
• Substrate Calculator
  - Estimate the volume and weight of substrate needed for a sand bed of a given height.
  
  
• System Volume Calculator
  - Estimate the volume of your aquarium system by performing a controlled salinity dilution.
  - This can be used for freshwater systems as well, if you are utilizing aquarium salts.
  
  
• Tank Volume Calculator
  - Estimate the volume of water different shapes of aquariums with sides of uniform thickness can hold.
  
  
• Tank Weight Calculator
  - Estimate both the full and empty weights of a rectangular aquarium.
  
  

• CO2 DI Resin Depletion Calculator
  - Estimate what percentage of a deionization (DI) filter is being depleted by carbon dioxide (CO2) alone.
  
  
• RO Membrane Performance Calculator
  - Estimate the actual rate of water production of a reverse-osmosis (RO) filter.
  
  
• RO Rejection Rate Calculator
  - Estimate the rejection rate of a reverse-osmosis (RO) filter.
  
  

• Alkalinity Conversion Calculator
  - Convert alkalinity between milliequivalents-per-liter (meq/L), carbonate hardness (KH, dKH), and parts-per-million (ppm).
  
  
• Flow Rate Conversion Calculator
  - Convert between various units of flow rate (gallons-per-hour, milliliters-per-minute, and so on).
  
  
• Salinity Conversion Calculator
  - Convert salinity between parts-per-thousand (ppt), relative specific gravity (sg), and units of conductivity (mS/cm).
  
  
• Salinity Correction Calculator
  - Correct a relative specific gravity (sg) measurement taken with a non-temperature-correcting hydrometer.
  
  
• Reverse Salinity Correction Calculator
  - Given a true salinity, estimate the relative specific gravity (sg) that a non-temperature-correcting hydrometer will observe.
  
  
• Temperature Conversion Calculator
  - Convert temperature between fahrenheit (F), celsius/centigrade (C), and kelvin (K).
  
  

• Calcium Reactor Contribution Calculator
  - Estimate the contribution of a calcium reactor towards the calcium and alkalinity in an aquarium system.
  
  
• Calcium Reactor Phosphate Contribution Calculator
  - Estimate the contribution of a calcium reactor towards the phosphate in an aquarium system.
  
  
• Direct Salt Addition Calculator
  - Estimate the amount of solid salt required to raise salinity to a target level.
  
  
• Jose Dieck's Calcium Reactor Setup Calculator
  - Estimate the effluent flow rate and alkalinity level required from a calcium reactor to maintain target levels.
  
  
• Jose Dieck's Reef Chemistry Calculator
  - Estimate the neccessary calcium, alkalinity, or magnesium additions required to reach a target level.
  - Click here for the enhanced flash version.
  
  
• Kalk Contribution Calculator
  - Estimate the contribution of a kalk solution towards the calcium and alkalinity of a system.
  
  
• Marine CO2 Level Calculator
  - Estimate the carbon dioxide (CO2) concentration given a few relevant parameters.
  
  
• Maximum Equilibrium O2 Level Calculator
  - Estimate the maximum equilibrium oxygen (O2) concentration given a few relevant parameters.
  
  
• Resulting Salinity Calculator
  - Estimate the resulting change in salinity when water is added, evaporated, or replaced.
  
  
• Saltwater Top-Off Calculator
  - Estimate the salinity of top-off water needed to increase overall tank salinity.
  
  
• Target Salinity Calculator
  - Create a water-change schedule that can be used to reach a target salinity.
  
  

• Freshwater CO2 Level Calculator
  - Estimate the carbon dioxide (CO2) concentration given a few relevant parameters.