Reef Chemistry Calculator ©
By: JDieck
Home Ca Reactor Setup Help
Thanks to M.G. Kademani for providing the basis for this calculator

Version 0.49 © Best Viewed at 1024 x 768 or higher resolution

This page is designed to calculate reef chemistry additions for
Calcium, Alkalinity or Magnesium using commercial products or standard chemicals.

Net Actual Aquarium Water Volume:
Volume Calculator
Current Calcium: ppm
Current Alk:
Current Mg: ppm
Desired Calcium: ppm
Desired Alk:
Desired Mg: ppm
Product Required:
Product Required:
Product Required:
Balanced Alkalinity is:
Balanced Calcium is:
pH Effects
Ca pH effect:
Alk pH effect:
Mg pH effect:
Warnings and usage:
Warnings and usage:
Warnings and usage:
     You should be very careful about the kinds of products or chemicals put into your aquarium. Many of these products require keen knowledge of how they interact with your aquarium and saltwater.
     All of the products presented should be used with full knowledge of their capabilities and limitations as many of these products may add more than just either Calcium, Alkalinity and/or Magnesium.
     If you don't know what a product does, don't use it. Consult your manufacturer.
     Given the variability of their granular size, powdered products conversion between volume and weight are approximations; for safety, use less than the calculated amount and measure the effect before adding the rest.
     Although every effort has been made to obtain accurate results and recommendations we can not assume responsibility for any problem related to the use of this calculator.

We want to thank Dr. Randy Holmes-Farley for his
articles and help with some of these calculations and
also we thank the manufacturers for providing and allowing
the use of their products and corresponding data.

I welcome your comments, questions and suggestions,
please feel free to drop me an email any time

All products and their brand name are copyright of their respective owners.
Although links to this page are allowed, this calculator is only intended to provide
information in support of marine aquarists and can not be used for commercial purposes
Neither this page nor it's source code or contained data either partially
or entirely can be used in any other site commercial or otherwise.
For more specific and detailed information in the use of a product, consult your manufacturer

30/07/19 v 0.49 ---- Updated concentrations for Aquaforest liquid alk and Mg and Continuum Mg Powder
23/10/18 v 0.48 ---- Added Red Sea Products
22/10/18 v 0.47 ---- Added Continuum Products
17/10/18 v 0.46 ---- Added Brightwell Aquatics products. Updated ESV BIonic Part 1
01/09/18 v 0.46 ---- Added MGcoral Products. Added Aquaforest Products
12/20/15 v 0.45 ---- Updated e-mail link
10/27/12 v 0.44 ---- Added Fritz ProAquatics Products
06/09/10 v 0.43 ---- Added Seachem Fusion
05/31/10 v 0.42 ---- Expanded warning for dry products
12/18/07 v 0.41 ---- Transferred to
02/03/07 v 0.40 ---- Added Salifert's All in One
01/16/07 v 0.39 ---- Updated Calc for B. Soda and BB SOda
12/26/06 v 0.38 ---- Added Salifert Products
07/26/06 v 0.37 ---- Added Kent's Tech.CB Parts A&B Calcium and Buffer System
07/05/06 v 0.36 ---- updated OB calcium concentration
06/05/06 v 0.35 ---- Added Warner Marine Products
05/17/06 v 0.34 ---- Added ESV Bicarbonate System
03/15/06 v 0.33 ---- Added Tropic Marin Bio-Calcium
02/18/06 v 0.32 ---- Added additional UOM and updated Randy's Mg notes
09/23/05 v 0.31 ---- Added MV Calcium Chloride.
08/06/05 v 0.30 ---- Added Calcium Chloride Dihydrate.
03/23/05 v 0.29 ---- Added Magnesium Chloride Hexaydrate and Anhydrous.
03/11/05 v 0.28 ---- Added Link to Volume Calculator Page.
03/08/05 v 0.27 ---- Added Updates for Seachem's supplements.
01/27/05 v 0.26 ---- Added Randy's Recipes 1 and 2 for Ca / Alk / Mg Suppl.
01/13/05 v 0.25 ---- Added Oceans Encounter Two Part and Mg Suppl.
12/02/04 v 0.24 ---- Added Two Little Fishies C-Balance Parts A and B
11/27/04 v 0.23 ---- Added Kent's Liquid Calcium; updated warning
10/30/04 v 0.22 ---- Added Mg Calculator; ppm option to alkalinity. Revised look.
03/13/03 v 0.21 ---- Added some warnings and usage comments.
02/13/03 v 0.20 ---- Added kalkwasser pH effects and warnings.
11/26/02 v 0.17 ---- Added Aquarium Systems Reef Evolution Cal, Ev SeaBuffer.
11/22/02 v 0.16 ---- Added Bionic, CaCl2, Washing Soda, liters, dKH.
11/22/02 v 0.15 ---- Added SeaChem Reef liquid products. Revised look.