Guard'n'Aid OxyPlus 12% – Hydrogen Peroxide for Hydroponics
Guard'n'Aid OxyPlus 12% – Hydrogen Peroxide for Hydroponics
£5.78 per litre · 5L
In stock
Couldn't load pickup availability
Share
Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £60 · 1–2 working days · Free Wembley pickup
- 14-day returns
- Price match promise
- Free Wembley store pickup
- Advice from the team: 020 3488 0419
Description
Extra Oxygen in the Reservoir, Cleaner Lines in the System
Guard'n'Aid OxyPlus is a 12% hydrogen peroxide (H2O2) solution for hydroponic growers. At a low feed rate it raises the oxygen content of the nutrient solution; at a higher rate it becomes a system cleaner that breaks down organic build-up in tanks, pipes and drippers. It can also be used for seed germination and as a preventative against pythium, and it breaks down to water and oxygen, leaving nothing behind in the reservoir.
Key Benefits
- Increases dissolved oxygen in the nutrient solution for healthier root development
- Keeps the system clean by breaking down organic matter in reservoirs and pipework
- Preventative against pythium and other root-zone problems in recirculating systems
- Two jobs, one product: a 7.5ml per 10L feed rate and a 75ml per 10L cleaning rate
- No residue - breaks down into water and oxygen
Why Does a Warm Reservoir Cause Root Problems?
Warm water holds less oxygen, and roots sitting in oxygen-poor solution slow down: nutrient uptake drops, roots turn brown and pythium finds an easy target. Dosing hydrogen peroxide releases oxygen into the solution and knocks back the organic sludge that pathogens live on, giving the roots a cleaner, better-aerated place to work, especially through the warmer months.
How to Use
- Oxygen feed: 7.5ml per 10 litres of nutrient solution, repeated 2-3 times a week as needed
- System clean: 75ml per 10 litres of water; circulate through the system or growing medium, then rinse the system through with clean fresh water before use
- Nutrients: for mineral (non-organic) nutrient solutions - peroxide kills beneficial microbes, so do not dose alongside bacterial or organic additives
- Handling: shake before use, wear gloves and eye protection, store cool and out of direct light
Technical Specifications
- Brand: Guard'n'Aid (HydroGarden)
- Active ingredient: hydrogen peroxide (H2O2), 12%
- Feed rate: 7.5ml per 10L nutrient solution, 2-3 times a week
- Cleaning rate: 75ml per 10L water
- Uses: reservoir oxygenation, system cleaning, seed germination, pythium prevention
- Suitable for: hydroponic systems with mineral nutrients

FREE Express Delivery on orders over £60. We aim to post same day on Express Delivery — order by 3pm Mon–Fri — and delivery takes 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.
