Athena Nutrients Blended Line – Cleanse — Hydroponic System Cleaner & Root Zone Optimizer
Best for: Growers running automated systems, recirculating setups, or anyone dealing with mineral scale and biofilm buildup
Our thoughts
Cleanse does one job properly: keeps your lines, emitters, and root zones clean without faffing about with bleach or vinegar. It's part of why Athena growers report consistency across cycles. Not the cheapest cleaner on the shelf, but the dosing's tiny so a bottle goes a fair way.
Athena Cleanse is a plant-safe system cleaner designed to prevent the mineral scale, biofilm, and organic buildup that clogs irrigation lines, emitters, and reservoirs. Made from hypochlorous acid — derived from salt via an electrochemical process — it breaks down unwanted deposits without toxicity, harsh chemicals, or damage to beneficial biology. Neutral pH and ultra-low TDS mean it won't destabilise your nutrient solution or interfere with nutrient balance, making it safe to use throughout the entire growing cycle.
How it compares
Cleanse sits in the mid-range professional cleaner category, positioned between basic flushing solutions and premium chelation products.
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vs General Hydroponics FloraKleen: Similar function, comparable pricing, but Athena's hypochlorous acid is gentler on beneficial microbes
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vs Botanicare Clearex: Clearex requires a dedicated flush window before harvest; Cleanse works throughout the cycle for ongoing maintenance
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vs Advanced Nutrients Flawless Finish: Flawless Finish is premium-priced with chelation therapy; Cleanse is more straightforward and cost-efficient for regular maintenance
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vs Cultured Solutions UC Roots: UC Roots combines cleansing with root biostimulants; Cleanse focuses purely on system cleanliness and ORP optimization
If you're after a no-nonsense system maintenance product that won't break the bank per application, Cleanse delivers.
Usage guidance
Dosing is small and flexible depending on your setup and conditions:
Regular maintenance (drip systems, hand watering)
Mix 2–5 mL per gallon of water and feed normally. Use this rate for ongoing prevention of scale and biofilm in lines and emitters. Keeps drippers running clear without needing emergency flushes.
Severe mineral or biofilm conditions
Increase to 5–10 mL per gallon of water. Use when you've spotted clogging, discoloured lines, or signs of mineral lockout. Run through your system and reservoirs to break down existing deposits.
Recirculating and DWC systems
Any closed-loop system benefits from Cleanse at 5–10 mL per gallon. Mineral residue builds up fast in recirculating setups; regular dosing prevents scale on pipes, reducers, and pump internals. Works with automated dosing systems.
System flushing (pre-harvest)
During your final flush stage, run Cleanse at 5–10 mL per gallon to remove residual mineral buildup from growing media and lines. Helps speed up the flush without harsh salt leaching.
Cutting and propagation
Dip fresh cuttings in a solution of 10 mL Cleanse per gallon of water to improve cell health and boost immunity. Propagation material treated with Cleanse shows stronger vigour and higher rooting success rates.
Foliar and surface sanitation
Mix 375 mL Cleanse per gallon of water and spray grow room surfaces, irrigation equipment, and work areas to maintain a clean environment without toxic residue. Plant-safe and non-phytotoxic.
Technical specifications
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Active ingredient: Hypochlorous acid (derived from salt via electrochemical treatment)
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pH: Neutral (will not destabilise nutrient solution)
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TDS: Ultra-low (minimal impact on conductivity)
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Safety: Non-toxic and non-nutritive; safe for all plant growth stages
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Function: Breaks down mineral complexes, prevents biofilm, improves oxidation-reduction potential (ORP)
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Available sizes: 32 oz, 1 Gallon, 5 Gallon
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Dosing rate: 2–10 mL per gallon (varies by application)
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Compatibility: Works with all growing mediums and irrigation methods; compatible with automated dosing systems
Who this is for
- Growers running automated irrigation systems who need consistent system maintenance
- Recirculating and DWC setups where scale and mineral buildup are ongoing issues
- Anyone in hard water areas dealing with mineral deposits in lines and emitters
- Propagators wanting to boost cutting health and rooting success
- Commercial and serious hobby growers who prioritise system longevity and equipment protection
- Growers using other Athena products (Cleanse integrates seamlessly with the Blended Line ecosystem)
Our take
This is a proper system cleaner that does what it promises without drama. The dosing's small enough that a gallon container covers a lot of feeds, making the cost-per-use reasonable. It's the kind of product that prevents problems rather than scrambling to fix them — which is always smarter than waiting for lockout or clogged emitters.
If you're serious about keeping your irrigation system running clean and your root zone in peak condition, worth picking up while stock lasts. Part of the reason Athena growers report consistency cycle to cycle.
