All For Reef Daily Dose Calculator
Estimate a daily Tropic Marin All-For-Reef dose from your reef tank's measured alkalinity consumption. Enter your actual water volume and alkalinity readings over a known number of days to calculate average dKH consumption and a corresponding estimated AFR dose. Use the result as a starting point and verify it with repeated testing.
- Measured dKH Drop
- 0.6
- Daily Alkalinity Consumption
- 0.3 dKH/day
- Calculated Dose per 100 L
- 5.357 ml/day
- Manufacturer Starting Dose
- 10 ml/day
- Manufacturer Maximum Dose
- 50 ml/day
- Difference From Target
- 0.1 dKH
- 500 ml Bottle Life
- 46.667 days
- 1000 ml Bottle Life
- 93.333 days
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The main result is the estimated daily All-For-Reef dose in milliliters. The calculator also shows measured alkalinity consumption, the dose per 100 liters, the manufacturer's standard starting dose for your system volume, and the manufacturer's recommended maximum daily dose. A stable alkalinity trend after dosing is more important than matching the estimate exactly.
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How to Use This Calculator
Enter your actual aquarium system water volume, the alkalinity reading at the start of your test period, the alkalinity reading at the end, and the number of days between measurements. For the cleanest estimate, avoid making alkalinity corrections during the measurement period. The calculator determines average daily alkalinity consumption and estimates the All-For-Reef dose needed to replace that consumption.
Formula & Methodology
Daily alkalinity consumption is calculated as (Starting dKH − Ending dKH) ÷ Days Measured. The dosing estimate uses a planning basis of approximately 0.28 dKH supplied by 5 ml of standard All-For-Reef solution per 100 liters of aquarium water. Dose scales proportionally with both water volume and measured alkalinity consumption. The result is then compared with Tropic Marin's recommended maximum daily dosage of 25 ml per 100 liters.
Example: 100 L reef consuming 0.56 dKH per day
If a 100-liter reef aquarium drops from 8.4 dKH to 7.28 dKH over 2 days, average alkalinity consumption is 0.56 dKH per day. Using the planning basis that 5 ml per 100 liters corresponds to approximately 0.28 dKH, the estimated replacement dose is about 10 ml of All-For-Reef per day. The dose should then be verified by monitoring alkalinity and calcium trends over the following days.
This is a proportional planning model, not a laboratory assay of your individual aquarium. Actual response can vary with real water volume, test accuracy, product preparation, coral uptake, precipitation, water changes, salinity, calcium and magnesium balance, and other chemical or biological processes. All-For-Reef supplies more than alkalinity, so alkalinity should not be considered in isolation. The calculator assumes standard prepared All-For-Reef concentration and does not replace regular testing.
For reef aquarium planning and educational use only. Calciro is not affiliated with, sponsored by, or endorsed by Tropic Marin. Verify current manufacturer instructions before dosing. Make changes gradually, monitor alkalinity and calcium, and do not exceed the product's recommended maximum daily dose without qualified expert guidance.
Frequently Asked Questions
- How do I calculate my tank's daily alkalinity consumption?
- Subtract the ending alkalinity from the starting alkalinity and divide by the number of days between measurements. For example, a drop from 8.4 to 7.8 dKH over 2 days equals 0.3 dKH of average consumption per day.
- How much All For Reef replaces 0.28 dKH?
- A commonly referenced planning basis from the Tropic Marin dosing calculator is approximately 5 ml of standard All-For-Reef solution per 100 liters of aquarium water for about 0.28 dKH of alkalinity contribution.
- Can I calculate All For Reef dosing directly from alkalinity consumption?
- You can estimate a starting dose by matching measured alkalinity consumption to the product's approximate alkalinity contribution, then verify and adjust the result using repeated alkalinity and calcium measurements.
- What is the standard starting dose for All For Reef?
- Tropic Marin recommends starting at 5 ml per 100 liters of aquarium system volume per day and adjusting gradually while monitoring alkalinity and calcium.
- What is the maximum daily All For Reef dose?
- Tropic Marin recommends not exceeding 25 ml per 100 liters of aquarium system volume per day.
- Should I use display tank size or actual water volume?
- Use the best estimate of actual system water volume after accounting for rock, sand, sump operating level, and equipment displacement. Using nominal tank size can overestimate the dose.
- How many days should I measure alkalinity consumption?
- A multi-day measurement usually gives a more useful trend than a single short interval. Keep dosing and other major variables as stable as possible during the measurement period and use consistent testing methods.
- What if my alkalinity is already below my target?
- This calculator is intended primarily to estimate ongoing daily replacement. A maintenance dose and a one-time correction are different tasks. Follow the product manufacturer's guidance for bringing parameters to the desired range before relying on a maintenance estimate.
- Why can my required AFR dose change over time?
- Coral growth, stocking changes, calcification rate, lighting, nutrients, water chemistry, and other factors can change alkalinity and calcium demand. Recalculate when your measured consumption trend changes.
- Do I still need to test calcium when dosing based on alkalinity?
- Yes. All-For-Reef supplies multiple components, not alkalinity alone. Tropic Marin recommends monitoring calcium or alkalinity regularly once the dose is established and checking the corresponding parameter periodically.
Published 8/8/2026