Mills CalMag 1L — Calcium & Magnesium Supplement

Mills CalMag 1L — Calcium & Magnesium Supplement for Soft & RO Water

If you live in a soft-water area, your plants could be lacking calcium and magnesium. Customers using RO systems will also have a deficiency in minerals and elements that this product helps address. Mills CalMag hardens soft water and provides the right amount of Ca and Mg, while simultaneously raising EC levels into the correct range. The Mills supplement that completes the Mills feeding programme for soft-water and RO setups.

Why growers choose Mills CalMag:

• Hardens soft water — adds the mineral content soft tap and RO lack
• Provides correct Ca and Mg ratio — addresses the most common deficiency combination
• Raises EC into target range — RO water needs minerals before nutrients work properly
• Prevents deficiency-driven yellowing — Ca/Mg deficiency causes leaf problems quickly
• Pairs with Mills feeding programme — Basis A&B, Vitalize, Start-R, Ultimate PK
• Compatible with any base nutrient — universal CalMag, not Mills-only
• 1L practical size — enough for many grows at standard dilution

Who it's not for:

Check your tap water EC before ordering. UK tap water is often already hard (EC 0.6-0.8+) — if yours is, you don't need CalMag and over-supply causes other problems. Most useful for RO users, soft-water rural areas, or tap filtered through RO. For similar products at different price points: Canna CalMag, Athena CaMg, Dutch Pro CalMag, VitaLink CalMag, Shogun CalMag are alternatives. Not a base nutrient — it's a supplement.

Available to collect from our Stone shop at Unit 24, Emerald Way, ST15 0SR — or ships the same working day from our UK warehouse. Not sure if this is the right fit? Give us a ring on 01785 556355 or email sales@roots2riches.com — we're growers ourselves, happy to help.