{"product_id":"pythoff","title":"Pythoff","description":"\u003csection class=\"gh-product-listing\"\u003e\n\u003ch2\u003ePythoff — Hydroponic Root Steriliser \u0026amp; Pythium Prevention for DWC \u0026amp; RDWC Systems\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e Growers running hydroponic systems who want reliable pythium and root-rot prevention without guesswork\u003c\/p\u003e\n\u003cdiv class=\"gh-our-thoughts\" role=\"note\" aria-label=\"Our thoughts\"\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eOur thoughts\u003c\/strong\u003e\u003cbr\u003eThis is the steriliser serious hydroponic growers reach for when they've had root problems in the past — or want to make sure they never do. Non-systemic, stable for weeks, and it actually works. One bottle lasts an age, which tells you everything about concentration and value.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eRoot-rot can wipe out a hydroponic system in 2-4 days. Pythoff is a \u003cstrong\u003enon-systemic hydroponic steriliser\u003c\/strong\u003e designed to keep your nutrient solution and root zone clean, treating and preventing pythium and other forms of root disease before they take hold. It's the kind of product that turns crop failure into crop security — especially in warm conditions or summer growing when pathogens thrive.\u003c\/p\u003e\n\u003cp\u003eUnlike some sterilisers that degrade quickly, Pythoff stays active for roughly 7 days per dose, giving you a stable, trustworthy level of protection without constant redosing. It's been used by commercial growers (including operations running 50,000+ plants) for decades, and it has a track record that speaks for itself.\u003c\/p\u003e\n\u003ch3\u003eHow it compares\u003c\/h3\u003e\n\u003cp\u003ePythoff sits in the \u003cstrong\u003epreventative steriliser category\u003c\/strong\u003e, positioned between aggressive shock treatments and microbial approaches.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Hydrogen peroxide:\u003c\/strong\u003e H2O2 works quickly but degrades within hours; Pythoff stays active for a week and won't damage beneficial inoculants if you use them separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Beneficial bacteria (e.g. Hydroguard):\u003c\/strong\u003e Bacteria fight pathogens passively; Pythoff actively sterilises the entire system, making it better for existing infections or high-risk scenarios\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Hypochlorous acid products:\u003c\/strong\u003e Similar sterilisation capability, but Pythoff is more stable in solution and has a longer active life — critical for consistent dosing accuracy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStability advantage:\u003c\/strong\u003e Pythoff PLUS is standardised to a specific concentration with 10+ year shelf-life. Most competitor products degrade rapidly, making dosing unreliable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUsage guidance\u003c\/h3\u003e\n\u003cp\u003ePythoff works across DWC, RDWC, NFT, and drip systems. Dosing is straightforward but precision matters — underdosing won't protect you, overdosing harms roots.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePreventative dosing\u003c\/strong\u003e\u003cbr\u003eAdd 2ml per 10 litres of reservoir into 1 litre of nutrient-free water, mix well, then add slowly to your reservoir over 30 seconds while stirring. Run your pump for 15 minutes to distribute it fully. Redose every 7 days as routine maintenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eActive treatment (existing root-rot)\u003c\/strong\u003e\u003cbr\u003eIf you've already got brown, slimy roots or early-stage disease, dose daily until the problem clears. Stop using organic additives during treatment — Pythoff works best in a clean system. Caught early enough, it can save your crop.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSensitive plants or seedlings\u003c\/strong\u003e\u003cbr\u003eUse half the stated dose for young plants or species that react badly to strong treatments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant compatibility notes\u003c\/strong\u003e\u003cbr\u003ePythoff is not compatible with hydrogen peroxide or beneficial bacteria products. Don't mix it with those. It's also unsuitable for living soils, coco-peat, or wood-chip substrates because it kills the beneficial microbes you need in those systems — this is a hydroponic product through and through.\u003c\/p\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Non-systemic hydroponic steriliser \/ nutrient conditioner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive ingredient:\u003c\/strong\u003e Proprietary water treatment formulation (FlairForm, since 1966)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose rate:\u003c\/strong\u003e 0.1–0.2 ml\/L (0.4–0.8 ml\/gallon)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreventative schedule:\u003c\/strong\u003e Redose every 7 days\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment schedule:\u003c\/strong\u003e Daily dosing for active root-rot infections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive life in solution:\u003c\/strong\u003e Approximately 7 days\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShelf-life (Pythoff PLUS):\u003c\/strong\u003e 10+ years (standardised concentration)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem compatibility:\u003c\/strong\u003e DWC, RDWC, NFT, drip irrigation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e Soil, coco-peat, wood-chip, or living substrate systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafe from:\u003c\/strong\u003e Seed to harvest (non-systemic, organic-compliant)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary benefit:\u003c\/strong\u003e Helps prevent plumbing blockages in drippers, jets, and filters by conditioning nutrient solution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho this is for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRDWC and DWC operators looking for reliable pythium prevention\u003c\/li\u003e\n\u003cli\u003eGrowers in warm climates or summer-growing regions (when root pathogens thrive)\u003c\/li\u003e\n\u003cli\u003eCommercial-scale operations where crop failure is costly\u003c\/li\u003e\n\u003cli\u003eAnyone who's had root-rot before and doesn't want it to happen again\u003c\/li\u003e\n\u003cli\u003eHydroponic growers prioritising system security over minimal chemical intervention\u003c\/li\u003e\n\u003cli\u003eOperators running multiple reservoirs where stability and long active-life matter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eParticularly well suited to growers who've learned the hard way that prevention is infinitely cheaper than recovery.\u003c\/p\u003e\n\u003ch3\u003eOur take\u003c\/h3\u003e\n\u003cp\u003ePythoff is the steriliser that professional growers trust because it works reliably and stays active long enough to be worth using. It's not the cheapest option, but a bottle lasts an age — the concentration is serious, the stability is proven, and the results speak for themselves.\u003c\/p\u003e\n\u003cp\u003eIf you're running hydroponic systems and you've either had root problems or you're smart enough to avoid them, this is worth picking up. Peace of mind in a bottle, and one less thing to worry about on changeover day. Good time to grab it while clearance stock lasts.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"PYTHOFF","offers":[{"title":"1 Litre","offer_id":47916192661674,"sku":"91197","price":36.99,"currency_code":"GBP","in_stock":true},{"title":"5 Litre","offer_id":47916192694442,"sku":"91198","price":129.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0053\/5540\/5400\/files\/91197_pythoff_1_litre_1.jpg?v=1769189112","url":"https:\/\/growershouse.co.uk\/products\/pythoff","provider":"Growers House ","version":"1.0","type":"link"}