Description
Calcium, magnesium, strontium and carbonate are the basic foundation elements of coral skeletons.
All of these elements need to be available in balanced proportions for positive coral health and growth.
Red Sea’s CALCIUM+ contains blended salts of calcium and strontium in the ratio required by corals and is part of Red Sea’s complete Reef Care Program.
1ml will raise the Ca level of 100 liters (25 gal) by 2ppm.
Delivery Information
| Delivery Option | Price | Speed | Best For |
|---|---|---|---|
| Free Local Delivery (Thanet) | FREE | 1–2 working days | CT8, CT9, CT10, CT11, CT12 postcodes |
| Economy (Royal Mail) | From £2.99 | 2–3 working days | Small/light items |
| Standard Courier | From £6.50 | 1–2 working days | Most orders |
| Express AM | From £9.99 | Next working day (AM) | Urgent orders |
| Saturday Delivery | From £12.50 | Saturday | Weekend delivery |
| Pallet / Large Goods | From £65 / free on qualifying mainland UK orders | 2–6 working days | Aquariums & heavy items |
All orders are fully tracked. Next-day cut-off is 1pm. Scotland, Islands & Northern Ireland rates calculated at checkout.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Shop with confidence


