Bulk Reef Supply

Bulk Pharma Calcium Chloride 7 Pounds

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Out of stock
$27.99 $39.99

Discontinued by Bulk Reef Supply
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This size has been discontinued.

Shop all Bulk Reef Supply calcium additives.

Bulk Pharma Calcium Chloride - Ultra Pure Calcium Additive for your Reef Tank!

Bulk Reef Supply 2-part additives are the perfect solution to replenish the intake of calcium and alkalinity coral consumes when it grows. Using only pharmaceutical based ingredients allows you to keep a cleaner reef with fewer impurities, leading to faster growth and more brilliant coloration of your coral. All BRS additives mix crystal clear and do not leave any nasty residues or brown impurities behind like other calcium and alkalinity additives. 


Makes over 6 gallons of BRS Calcium Liquid Solution

Buy in bulk and SAVE MONEY!

  • Resealable Packaging
  • No residue left behind
  • Mixes fast and clear
  • Designed for easy dosing


Mixing Instructions - BRS Calcium Liquid Solution

Fill a 1-gallon container 4/5 full of RO/DI or distilled water and then add 2-1/2 cups (514 grams) of BRS Pharma Calcium Chloride into the container. Secure the cap on the container and shake it for about 10 seconds to help start the dissolving process. Remove the cap and fill the container the rest of the way with RO/DI or distilled water. Give the container a few more shakes and then let it sit until all the salts have fully dissolved before use.


Dosing Instructions

Knowing how much to dose is made simple using the BRS Reef Calculator!


General Calcium Adjustments - Create a 1-gallon solution by following the Mixing Instructions above and then test your aquariums current calcium level and using the BRS Reef Calculator input your current and desired calcium levels along with your total system water volume. BRS Calcium Liquid Solution (New Pharma Pouch) option from the drop-down menu and select calculate. The result will be how much calcium solution you will need to add to raise your aquariums water volume to the desired level. We suggest adding small amounts at a time into a high flow area of the tank, like a power heads output or a sump baffle. It is important to keep changes limited to under 50ppm or less per day to not shock your corals.

Tip: If you are having issues raising your calcium, check to ensure your aquarium magnesium level is between 1200-1350ppm and that the solution is added to a high flow area of the tank.


Daily Dosing 

Step 1. Start by following the General Adjustments instructions above to adjust your aquariums calcium, along with alkalinity and magnesium to your desired levels for your dosing regime starting point.

Step 2. Wait 5 days and retest your aquariums calcium level and compare the results to your starting point levels to find the difference. The difference between the starting point and the final reading is how much alkalinity will need to be replaced over the course of a 5-day span of time. We recommend testing at the same time of day as alkalinity levels can fluctuate throughout the day.

Step 3. Go to the BRS Reef Calculator and input your new desired level and your new current level along with your total system water volume. Select the BRS Calcium Liquid Solution (New Pharma Pouch) option and then calculate. That amount will be the total solution needed for a 5-day span of time for your reef tank. To know your daily dose just divide that number by 5 (see example below).

Step 4. Replenish your calcium by adding the 5-day total to your aquarium and any other diminished levels back to your desired starting point, then wait a few hours before starting your daily dosing regime.

Step 5. Monitor and adjust daily dose as necessary. If your calcium levels are slowly rising, we suggest subtracting 10% per day until it is stable. If your calcium levels are dropping slowly we suggest raising your daily dose by 10% per day. 


Example for 100-gallon aquarium:

Calcium Level Day 1 @ 8pm - 420ppm (desired level)

Calcium Level Day 5 @ 8pm - 410ppm (current level)

5-Day Calcium Requirement - 102.3 mL (provided by BRS Reef Calculator)

Daily Calcium Requirement - 20.46 mL (102.3 mL / 5 days)


Calcium Chloride Instructions


Want to see how BRS Pharma Calcium Chloride stacks up against the others?


Calcium ICP-MS Results


What is 2-Part Dosing?

As corals grow they consume calcium and alkalinity but to keep the levels steady in a reef tank requires the use of magnesium too, so it is more like 3-part dosing, to be honest. Reefers will use calcium chloride and soda ash (sodium carbonate) to maintain their reef tanks chemistry daily and add a magnesium supplement every couple weeks. Magnesium supplements are usually a blend of magnesium chloride and magnesium sulfate to help keep the sulfate to chloride ratio balanced in the aquarium. When starting a 2 part dosing system it is important to use a good test kit to establish a baseline. We really like using the Red Sea Reef Foundation test kit or Hanna Colorimeters for their accuracy and repeatability which leads to a much more stable reef and overall coral health. Stability is one of the keys to keeping a saltwater tank healthy over a long span of time and most reefers will set up an automated system that doses their aquariums needed additives daily removing repetitive (and forgettable) chore. There are purpose-built dosing systems like the Kamor X4, Neptune DOS, or Bubble Magus T-11 that are super easy to program and keeps everything in a compact package, but there are other options that many reefers prefer like the BRS 1.1mL dosing pumps that can be paired with a digital timer for precise and affordable dosing control. 

More Information
UPC 853710007032
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Product Questions

Will this be back in stock soon?
Question by: Chris on Jan 9, 2024, 10:47 AM
Hi there, thank you for the question. Unfortunately the 7 pound bag has been discontinued.
Answer by: Grace (BRS Staff) on Jan 26, 2024, 10:45 AM
Can this be used to raise KH in fresh water aquarium?
Question by: Liam McLaughlin on May 21, 2023, 12:23 PM
Hey there,
Thank you for reaching out to us. No, you it would not raise the KH.

Please let me know if you need anything further and take care!
Answer by: Matt Lucero (BRS Staff) on May 26, 2023, 9:21 AM
What is the purity of the BRS calcium chloride, the packaging doesn't say.
Question by: Tim Stenger on Jul 17, 2022, 3:47 PM
Thanks for the question! Based on the MSDS information we have on the calcium chloride, the purity is 99% or greater leaving no room for testable impurities. Let us know if we can help with anything else!
Answer by: Kyle Thomas (BRS Staff) on Jul 19, 2022, 11:37 AM
How many gallons does a 7lb bag of calcium chloride make?
Thank you.
Question by: Lisa Nguyen on Nov 25, 2021, 2:51 PM
It will make just over 6-gallons.

"Makes over 6 gallons of BRS Calcium Liquid Solution"
Answer by: Matt Lucero (BRS Staff) on Nov 27, 2021, 12:18 PM
Can this product be stored in a clear plastic container?
Question by: Ali Najeeb on Nov 23, 2021, 2:01 PM
Hello, thanks for the question. Yes you can store this product in a clear plastic container, just make sure to keep it sealed and dry. Thanks.
Answer by: Christian (BRS Staff) on Nov 23, 2021, 3:36 PM
How many gallons does the 7lb bag of soda ash and CA make? Also can you weight it out for making a gallon instead of measuring? Thanks
Question by: eddie Roggero on Aug 9, 2019, 6:29 PM
Hey there,
Thank you for reaching out to us. It will make just over 6 gallons total, and you can calculate it out to weight it rather than measure it, which would be more accurate.

Please let us know if you need anything further and take care!
Answer by: Matt Lucero on Aug 12, 2019, 11:15 AM