Run to Waste Nutrients
Run to waste nutrients built for rockwool, perlite and dripper systems — inert base formulas from Canna, Athena, Green Planet and FloraMax that feed clean every cycle, with nothing recirculated and no salt build-up.
Run to Waste Nutrients That Feed Fresh Every Cycle
Inert bases matched to run to waste media
These formulas are built for single-pass feeding in rockwool slabs, perlite bags and dripper systems. Canna's Classic Vega and Flores sets are the RTW benchmark, purpose-made for inert media where every irrigation drains to waste.
From first grow to commercial rooms
Trichfecta+ by BioMega is the top seller here — a complete set that takes the guesswork out. Step up to Athena's Pro line powders for commercial-scale mixing, or run GP3's three-part base for full control over every ratio.
Matched to your system by actual growers
Fourteen years of growing behind every recommendation. Tell us your medium and feed schedule and we'll match the base and strength to suit — stocked in Australia, shipped discreetly.
Build out your feed room: hydroponic nutrients, coco nutrients, recirculating system nutrients and growth additives.
FAQs
Are run to waste nutrients different from recirculating nutrients?
Yes. Run to waste formulas are dosed for single-pass feeding — every irrigation delivers fresh solution and the runoff drains away, so they're built for stability at the dripper rather than long reservoir life.
Can I use run to waste nutrients in rockwool and perlite?
Yes. Rockwool and perlite are inert media, which is exactly what these bases are designed for — the medium adds nothing, so the feed carries the complete nutrient profile.
Do I need an A and B set?
Usually, yes. Most RTW bases split into A and B parts to keep concentrated calcium and sulphates apart. Athena's Pro powders and one-part options like Veg-1 by FloraMax are the exceptions.
Welcome to The Grow Guys
We built The Grow Guys from the soil up — well, coco and perlite. Before we sold gear, we bought it, ran it, and learned the hard way what's worth the money and what ends up in the shed. That's the filter everything on our shelves passes through. No sales scripts, no rebadged junk, no telling you what you want to hear. Just gear we'd run ourselves and advice from people who actually grow. Chasing higher yields, tighter flowers, or your first harvest? You're in the right place.
FAQs
Calculated at checkout by weight and destination. Free shipping over $499*.
Order by 2pm and it ships the same business day from Invermay, Tasmania.
500+ products across 40+ brands, every one filtered through 14 years of real growing experience. Shipping Australia-wide.
30-day change-of-mind returns on unopened, unused products. A 10% restocking fee applies and return shipping is at your cost.
Call, email, or walk into the Invermay shop. You'll get a grower on the other end, not a script.