Nothing matches all of those filters.
Enzymes
Break down dead root matter, so a medium can be reused and the root zone stays clean.
Cal-Mag, silicon and single elements
For soft water, strong light, and correcting one shortage without lifting the whole feed.
Microbes, seaweed and organic inputs
Living cultures and plant extracts that work on the medium rather than the plant.
System cleaners
For drippers, tanks and clearing salt build-up out of the medium.
Additives and plant tonics
Aminos, vitamins and wetting agents that sit outside every other heading.
The full range
Enzymes, cal-mag and specialist correctives
This is the catch-all for the additives that don't fit neatly into veg or flower boosters but solve specific problems: dead root matter building up, calcium and magnesium deficiency, or a reservoir that needs stripping back to plain water. If you only add one thing from this category, make it a cal-mag supplement — coco and RO water are both naturally low in calcium and magnesium, and deficiency shows up as rust spotting on lower leaves within a couple of weeks.
Canna Cannazym breaks down dead root material and converts it back into usable nutrition, worth running continuously in coco and hydro where root turnover is constant. Canna Flush and Athena Cleanse clear built-up salts from the root zone before harvest or when correcting a lockout — flush at label rate for one to two waterings, not indefinitely, since the plant still needs some nutrition. Canna's Mono range (Calcium, Iron, Nitrogen, Phosphorus, Potassium) lets you correct a single deficiency precisely rather than dosing a full booster you don't need.
Specialist additives on the shelf
- Canna Cal-Mag Agent — a straightforward calcium and magnesium top-up for coco and hydro growers running RO or soft tap water.
- Ecothrive Charge and Neutralise — a slow-release organic feed and a chlorine/chloramine neutraliser for growers on mains water.
- Alien Root Rot X and Bloom Seaweed — a root-zone pathogen treatment and a mineral-rich seaweed extract for general plant resilience.
If you're seeing consistent deficiency symptoms, check your water source first — hard tap water often already carries enough calcium, so adding more on top of a base feed with built-in cal-mag can push EC too high. Our feeding in coco guide covers common deficiency signs and run-off targets. See pH and nutrient control for meters and calibration fluid to check readings before you correct anything.
Free UK delivery over £60. Pop into our Wembley store or call 020 3488 0419 for straight advice.