How to use this aquarium dosing pump calibration calculator
Follow the exact pump's calibration instructions and collect the test liquid outside the aquarium. Enter the actual collected milliliters and elapsed seconds, then an independently chosen volume for the separate runtime projection. If the test had a commanded volume, enter it in the optional comparison field. Leave it blank for a timed-only test. Do not compare the collection with a daily dosing target or a command from a different interval or pump head.
How the calculation works
The basic observation is volume per time. Divide collected milliliters by measured seconds for mL/second, or multiply that rate by sixty for mL/minute. Dividing a chosen delivery amount by the observed per-second rate gives a projected runtime in seconds. The calculation assumes that the same operating setup produces the same average rate. It is not evidence that a very short delivery will behave identically to a long calibration run, especially when starting and stopping effects matter.
Manufacturer procedures are not interchangeable. Reef Factory's manual describes a timed calibration collection and entering the observed amount, while other devices use their own controls and reference procedures. Use the actual instructions for your model rather than treating this web worksheet as its configuration screen. No information is sent to a pump. A number expressed in mL/minute cannot be copied into a field expecting elapsed time, steps per milliliter, or another manufacturer-specific calibration parameter without confirming its meaning.
The optional comparison uses commanded test volume as its denominator. Signed percentage error equals collected minus commanded, divided by commanded, multiplied by one hundred. A positive answer means more was collected than commanded; a negative answer means less. Zero means those entered quantities match at the precision represented. It is not a declaration that the device meets a manufacturer's tolerance, because the calculator has neither a certified reference measurement nor a model-specific acceptance limit.
The independently chosen delivery volume belongs to a different question: how long would this measured rate take to deliver that amount? It is not the expected collection from the earlier test. Keeping the fields distinct prevents a common error in which a user compares a sixty-second collection against a small daily dose and concludes that the pump has a huge calibration fault. Use the same test's actual command only when one exists, otherwise leave the percentage comparison unavailable.
A single observation does not establish repeatability. The actual liquid, tubing arrangement, trapped air, pump condition and operating setup need appropriate consideration under the manufacturer's procedure. If weighing a collection, mass requires the liquid's relevant density to become a volume; one gram is not automatically one milliliter for an unknown supplement. This interface accepts measured mL, not grams or an assumed density. Record each pump head separately rather than combining unlike heads into one average rate.
Formulas
Measured flow
Projected runtime
Optional signed test error
Worked examples
A timed collection without a volume command
Collecting 50 mL in sixty seconds gives 50 mL/minute, or approximately 0.833333 mL/second. At the same average rate, a separately chosen 10 mL delivery projects twelve seconds. If the original test was timed-only, its commanded-volume field stays blank and the percentage-error card is a prompt, not zero percent. No daily chemical amount is inferred from this example.
Compare against the same test's command
If a different test commanded 40 mL but collected 50 mL in sixty seconds, the difference is +10 mL and the signed error is (50 − 40) / 40 × 100 = +25%. A collected 36 mL for a 40 mL command instead gives −10%. These signs describe over- and under-delivery for those observations, not an instruction to increase or decrease an arbitrary firmware field by that percentage.
Common uses
Check a manual volume-time calculation
Use visible units to compare a collection with your own arithmetic. Keep the measured duration, liquid volume and configuration with the result. A projected runtime is conditional on that measured flow and must be checked against the actual device's supported operating limits.
Document a delivery comparison
Record a commanded test amount and its measured collection without confusing them with a dosing prescription. Repeated observations can be logged outside the tool to assess variation, but this version does not average trials, save records, estimate uncertainty or certify a pump's performance.
Accuracy and limitations
Display precision can exceed the resolution of a measuring cylinder or timer. Do not interpret a small displayed error as proof of calibration quality, or a match as a fail-safe guarantee. Recheck actual collection after any device-specific adjustment under the manufacturer's procedure.
No safe daily supplement amount, chemical compatibility, device programming, alarm function or universal calibration correction factor is supplied. A zero or invalid duration is rejected; missing commanded volume removes only the optional comparison and does not masquerade as a zero-error test.
Sources and methodology
References support unit conversions, relevant material or energy calculations, and husbandry context where listed. NumUtility's geometric and arithmetic models are explained above; they do not establish safe stocking, maintenance requirements, or structural capacity.
Frequently asked questions
Can this automatically calibrate my dosing pump?
No. It calculates a measured rate and optional test error. Entering settings, performing device-specific calibration and confirming actual delivery remain separate steps governed by the equipment instructions.
Does the runtime result recommend a daily dose?
No. You supply the desired liquid amount independently. The worksheet does not contain supplement strength, aquarium chemistry, livestock needs, safe-change limits or dosing schedules.
What does a positive calibration error mean?
Collected liquid exceeded the commanded volume for the same test. A negative value means under-delivery. Neither sign establishes the direction of a manufacturer-specific calibration setting.
Are my product details and measurements saved?
No. Values are processed in your browser without an account and are not sent to NumUtility for calculation. Keep your own product instructions and dated measurement record if you need to repeat or audit a result.