Calcium Carbonate

Rated 5.00 out of 5 based on 3 customer ratings
(3 customer reviews)


Why Use It?

Calcium is critical to the health of your plant, Calcium Carbonate adds diversity to your calcium sources, balancing pH and supplementing calcium.

Product Documents

Not Available in California

Product Description

Product form:

Dry powder, water soluble

NPK analysis:


Other product highlights:

98 percent calcium carbonate. This product adds diversity to your calcium sources.

Primary function/use:

Balancing pH (more alkaline) and supplementing calcium.

Well suited for:

Any indoor or outdoor gardening environment.

Product designation:


Directions For Use

When and where to use:

Ideal for all stages of plant development (grow and bloom).

Foliar spray:

Mix one (1) tbs. with one (1) gallon of water.


Ensure bag is properly sealed and stored in cool, dry, dark place.

For soil and soil-less:

Mix one (1) tbs. with one (1) gallon of water.

For hydroponics:

Mix one (1) tbs. with one (1) gallon of water.

All items are shipped using USPS Priority Mail, unless otherwise requested and arranged by the customer, prior to order completion.Free Shipping

All orders ship within 48 hours of order confirmation and as always FREE SHIPPING in the USA. After successfully placing an order from you will receive an order confirmation email with the details of your order to the email address provided.

Once your order has shipped you will be emailed specific tracking information.

To check the status of an order please visit our “View Order” page.

Gift Cards are electronically delivered to your email address.

State of Idaho is not an option for shipping any of our products. If you are in the State of Idaho, please contact us direct.

Kelp4less Disclaimer

While Kelp4less has made every effort to ensure accuracy of information on its website and labels, Kelp4less assumes no responsibility or liability for the use and results of any of it’s products.

The purchaser and the end user of Kelp4less products assumes sole responsibility and liability for product use, results and disposal. Kelp4less makes no guarantees either express or implied.

3 reviews for Calcium Carbonate

  1. Rated 5 out of 5

    Nick (verified owner)

    I use this to buffer the pH in my aquaponics system. It keeps my ph at safe levels and supplements calcium, which is a common deficiency in aquaponics. I like it in the powder form rather than using sea shells. Much easier to dose and you know you’re not adding any sodium.

  2. Rated 5 out of 5

    Chad (verified owner)

    Great source of affordable calcium!
    Made some cool stuff with this and some organic acids.
    Also excellent mixed into your substrate to ensure calcium is always available.

  3. Rated 5 out of 5


    I actually bought this product once I realized that it is basically the same as a MUCH more expensive product that’s marketed as a foliar nutrient spray. After doing a side by side comparison, I decided to be nice to my wallet and stopped buying the other, over-priced, brand. I mix this is my spray bottle and spray the underside of the leaves on pretty much ALL my plants. I just love to see the leaves perk up after being sprayed. The good thing is that you don’t need to saturate the plant to reap the benefits. Great product and a great price!

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