Progressive Earth Christmas Opening Times

Last shipping in 2022 will be on 20th December. Please order your supplies soon to avoid running out in the busy period before and after the festive holidays. Click here for full details.

Two brand new products: Pro Veteran Specially developed for elderly horses & ponies and adult horses and ponies that require additional immune system and joint support. PLUS Vegetarian Glucosamine derived from a fungal source. We still offer for sale our popular shellfish-derived Glucosamine as well. 
Royal Mail Strike Action is causing heavy delays to some deliveries. Please allow extra time for delivery before contacting us. This will help us enormously and enable us to concentrate on fulfilling orders.

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


Weight DescriptionPriceQuantity
2kgHover your mouse here to view multi-buy discountsClick here to view the multi-buy discounts below. £8.99 -+
QuantityDiscountPer Item Price
3 -£0.50 £8.49
4 -£0.75 £8.24
5+ -£1.00 £7.99

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

A feed material for 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 2 Kg of product.
Multiple purchase options are available.


  1. Sarah (verified owner)

    Arrived quickly and a nice fine powder.

    (0) (0)

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