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Canna Calmag Agent

Regular price £12.11 £13.45 | Save £1.34 (9% off)
Tax included. Shipping calculated at checkout.
In Stock
SKU: 1276
Spend £50.00 more for free delivery (shipping surcharges still apply)

Canna Calmag Agent

1l - £12.11
  • 1l - £12.11
  • 5l - £35.96

Canna Calmag Agent


Canna Calmag Agent is a buffering additive that is designed to be added to soft or RO water to make your tap water more suitable for hydroponic use.

If you live in a soft water area (if the EC of your tap water is less than 0.4) then Calmag Agent will help you bring your water up to what Canna consider normal, or optimal, for use with their products. They state that their UK nutrients are designed to be used with water that has a base EC of 0.4 - 0.7 as this is the background EC range that will give the best results when using their nutrients.

Canna Calmag can also be used to give RO water a decent buffer level and bring the water back up to a point where using the standard Canna Nutrients are possible, without this buffering the pH of the solution will be very hard to control.

Canna make some of the best nutrients on the market, getting your base water into the zone that they formulate their nutrients to work best with makes a lot of sense. If you have soft water or use RO water and also use Canna Nutrients, this product is a no-brainer.



Delivery Information

Most orders are shipped within 24 hours.

Orders are currently shipped with Parcelforce (Express 24 service for standard and heavy/bulky items) or DPD Local (Premium next-day), a signature will be required on delivery. We have been shipping orders for 15 years and our courier choices are subject to change as service levels fluctuate.

All orders are shipped on a next day courier service – you will be informed via email or SMS the evening your order leaves us so you know to expect it the next day. On the morning of delivery you will get another SMS or email informing you of the expected delivery time.

If you have any questions on delivery please get in touch.

As the website calculates some charges by weight it is possible that shipping is not calculated correctly. We reserve the right to get in touch in these circumstances we will request the additional amount or offer to refund the order.

UK Delivery

Standard delivery to the UK Mainland addresses (excluding Scottish Highlands & Islands, offshore and N.I.) is charged at a flat rate of just £5.95 per order or £7.95 (for the premium next-day service), standard delivery (with Parcelforce) is free* for orders over £50.

*Large and/or heavy items attact a surcharge from our courier - shipping surcharges are calculated per item and are applied regardless of order value.

Non-UK mainland destinations are charged by weight.

International Delivery

Coming soon…

Collect in Store (Bristol)

We now offer a 'collect in store' option, which allows you to pay for goods online and collect from our Bristol store at time that suits you (within our opening hours).

The process is simple:

  1. place your order and pay online, select 'Pick Up' at checkout;
  2. receive an email confirming that the order is ready for collection;
  3. bring/show your confirmation email and photo ID to collect your order.


<li><a title="Canna Deficiency Guide" href="" target="_blank">Canna Deficiency Guide</a></li>
<li><a title="Canna Pests &amp; Diseases Guide" href="" target="_blank">Canna Pests &amp; Diseases Guide</a></li>

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