Progressive Earth's latest Brand New Product now available: PRO 3 TRACE. Contains three essential trace minerals that are commonly low in UK forage: Copper, Zinc and Selenium in a high quality, highly absorbed form.

CORONA VIRUS update: We are very short staffed but are doing our very best to process orders as normal. The Postal Service is also extremely stretched at this time, which has had a significant impact on their ability to maintain the usual service levels; therefore, there may be disruption to some deliveries. Please be patient and allow extra time for your order to be delivered before contacting us, the estimated delivery is a guide only and not a guarantee.                                           Many thanks for your understanding.

CALCIUM CARBONATE – Limestone flour for equine forage mineral balancing, healthy bones, teeth and fertility.


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Calcium Carbonate – A natural source of Calcium for the supplementation of horses.

This product contains 39.4% elemental calcium. 10 g of product contains 3.94 g of calcium.

As a guide a 30 ml scoop holds about 32 grams of calcium carbonate.


  • Horses which require additional calcium in their diets.
  • Ideal for those diets where balancing mineral requirements to forage analysis is important.
  • Horses on high cereal diets.
  • When needing to balance Calcium:Phosphorus or Calcium:Magnesium ratios (an ideal ratio of calcium to phosphorus is 2:1 and for calcium to magnesium it is 2:1).

Please note: The feeding of mineral separates should not be undertaken without having your forage, either hay or pasture, analysed and the correct mineral ratios established. If you are unable to carry out a full mineral analysis from all sources of forage and are uncertain of the mineral levels required, we recommend feeding a premixed supplement/balancer instead. Please see the Progressive Earth equine balancers in our shop for more details.

Pack size and availability: Progressive Earth Calcium Carbonate equine feed supplement is available in resealable grip seal pouches which contain either 1 Kg, 2 Kg or 4 Kg of product.
Multiple purchase options are available.


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