Aquarium Calculator

Parameter Standard Metric Units
Enter Aquarium Length inches or mm
Enter Aquarium Width inches or mm
Enter Aquarium Height inches or mm
Aquarium Volume gallons or liters
Enter Temperature fahrenheit or celsius

Water Change Wizard (Instructions - Click Here)

Parameter Standard Metric Units
1. Enter Aquarium Volume gallons or liters
2. Enter Estimate of Daily Evaporation gallons or liters
Daily Evaporation % %
Weekly Evaporation gallons or liters
3. Enter Estimate of Pollution Accumilated Per Day
ppm or mg/l
4. Enter Pollution Level of Source Water ppm or mg/l
5. Enter Pollution Level of Aquarium ppm or mg/l
6. Select Water Change Frequency
Days Between Water Changes days
7. Enter Water Change % %
Water Lost to Evaporation %
gallons or liters
Actual Water Removed %
gallons or liters
Actual Water Needed gallons or liters
----------------------
8. Enter Pollution Level Goal ppm or mg/l
Goal Water Change % %
Goal Water Needed gallons or liters
-------------------------
Pollution Level Before Next Water Change ppm or mg/l
Pollution Change ppm or mg/l
This Section is for Drip Systems Only (is not accurate if drip system is not selected for the "water change frequency" above)
9. Enter Drip Rate gph or ml per minute
Drip rate % % per second
Actual Water Usage Per Day gallons or liters
Goal Drip Rate gph or ml per minute
Goal Drip rate % % per second
Goal Water Usage Per Day gallons or liters
Estimates of Pollution Levels for Future Times
Next Week ppm or mg/l
2 Weeks ppm or mg/l
Next Month ppm or mg/l
2 Months ppm or mg/l
6 Months ppm or mg/l
1 Year ppm or mg/l
2 Years ppm or mg/l
4 Years ppm or mg/l
Pollution Level Plateau Before Water Change ppm or mg/l
Pollution Level Plateau After Water Change ppm or mg/l
Osmotic Stress Index (Change in Pollution) ppm or mg/l
Within .1% of Plateau reached in Day Intervals
Water Change Frequency Equivalency Chart using the Water Change % Entered
Frequency Water Change % % of Fresh Water
Needed Per Day
Osmotic Stress Index
(Change in Pollution)
Gallons Per Day Gallons Per Week Liters Per Day Liters Per Week
Drip System / Every Second %
Hourly %
Every 12 Hours %
Daily %
Every Other Day %
Bi-Weekly %
Weekly %
Every 10 Days %
Every Other Week %
Every 3 Weeks %
Monthly %
Every other Month %
Every 6 Months %
Yearly %

Application created by Keith Allen and Keith Wolcott