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Hydroponic Systems & Methods

DWC, NFT, ebb and flow, drain to waste, AutoPot, each system trades off differently between maintenance, yield potential and tolerance for things going wrong. These guides break down how each method actually works, which crops and spaces suit which system, and the specific setup and troubleshooting details that generic overviews tend to skip.

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Hydrogen Peroxide vs Beneficial Bacteria: Sterile or Bioactive Reservoir Management?
Quick Answer: Sterile or Bioactive Reservoir Management? A sterile approach uses oxidisers like hydrogen peroxide to suppress microbial activity broadly. A bioactive approach deliberately introduces beneficial microorganisms to the root zone. Oxidisers aren't selective. They don't distinguish between harmful pathogens and the beneficial bacteria you're trying to establish. Don't introduce beneficial bacteria while an active oxidiser is still present in the reservoir. It will undermine the biological treatment before it has a chance to work. Mixing both approaches at once usually means you get the benefits of neither, since the... Read more...
Why Is My Hydroponic Water Pump Not Working Properly?
Quick Answer: Water Pump Not Working Properly Always disconnect the pump from power before removing it, opening the housing, or touching the impeller. A pump humming but not moving water usually means an airlock, blocked intake, jammed impeller, or the water level has dropped too low. Flow that declines gradually, rather than stopping suddenly, is almost always mineral scale, root intrusion, or nutrient residue building up inside the pump and tubing. Running a pump dry even briefly can overheat and damage seals, bearings or bushings, so don't assume it's fine... Read more...
Hydroponic Water Pumps vs Bunnings Pumps: Why Reservoir Pumps Need to Work Harder
Hydroponic Water Pumps vs Bunnings Pumps: Why Reservoir Pumps Need to Work Harder
Bunnings pumps are built for ponds and fountains. Hydroponic reservoirs need a pump that runs continuously, for months, in nutrient solution. Here's what actually matters when choosing one. Read more...
Hydroponic Pumps and Irrigation: How to Choose the Right System for Your Grow
Quick Answer: Hydroponic Pumps and Irrigation Australia Submersible pumps sit inside the reservoir and push nutrient solution to plants. External pumps sit outside and pull solution through. Match pump flow rate (L/hour) to your system size. Undersized pumps that cannot maintain pressure cause uneven feeding across multiple plants. Air pumps and air stones increase dissolved oxygen in the reservoir, critical for DWC systems and root zone health in warm Australian summers. Timer-controlled irrigation is more consistent than hand watering and delivers better results in drain-to-waste systems. Irrigation frequency depends on... Read more...
DWC Hydroponics: The Beginner's Guide to Deep Water Culture
Quick Answer: DWC Hydroponics for Beginners Deep Water Culture suspends plant roots directly in aerated nutrient solution with no growing medium in the reservoir. DWC produces some of the fastest growth rates of any hydroponic system because roots have unlimited access to oxygen, water, and nutrients simultaneously. The air pump and air stone are the most critical components. If they fail, roots die within hours in warm conditions. Target reservoir temperature of 18 to 22 degrees Celsius. Above 22 degrees, dissolved oxygen drops and Pythium risk increases significantly. Check and... Read more...
Rockwool Cubes for Hydroponics: Setup, Sizing, and Where It Fits
Rockwool Cubes for Hydroponics: Setup, Sizing, and Where It Fits
Quick Answer: Rockwool Cubes for Hydroponics Australia Rockwool is spun volcanic rock fibre. It's inert, sterile, and holds both water and air in roughly equal proportion. Soak new cubes in... Read more...
Water Pump vs Air Pump in Hydroponics: Which One Does Your System Need
Quick Answer: Water Pump vs Air Pump in Hydroponics A water pump moves nutrient solution around your system -- circulating, feeding, or draining. An air pump pumps air, not water -- it oxygenates the reservoir through an air stone. Recirculating systems like NFT and ebb and flow need a water pump to move solution at all. DWC needs an air pump above almost everything else -- submerged roots have no other oxygen source. Most established systems eventually run both, for different jobs -- they are not interchangeable. If you only... Read more...
AutoPot Self-Watering Systems: The Complete Australian Guide
Quick Answer: AutoPot Self-Watering Systems Australia AutoPot is a passive gravity-fed system. No pumps, no timers, no electricity required at the pot level. The Smart-valve is the key component. It opens to deliver nutrient solution only when the tray is dry, then closes automatically. Best growing media: coco coir, perlite, or a coco/perlite blend. Avoid soil mixes that compact and restrict the valve. Salt buildup is the most common problem. Flush media thoroughly every 4 to 6 weeks to prevent EC creep at the root zone. Start with the reservoir... Read more...
Growing in Coco Coir: The Complete Australian Guide
Quick Answer: Coco Coir Hydroponics Coco coir is inert. It contains no nutrients and requires a complete hydroponic nutrient program from day one. Buffer coco with Cal-Mag before first use. Coco naturally binds calcium and will strip it from your nutrient solution if unbuffered. Never let coco dry completely. It becomes hydrophobic and water channels through rather than absorbing evenly across the medium. Pot size matters more in coco than any other medium. Too large holds too much water and prevents the dry-back cycle roots need. Cal-Mag supplementation is essential... Read more...
Perlite vs Vermiculite: Which One Do You Need for Hydroponics?
Quick Answer: Perlite vs Vermiculite for Hydroponics Australia Perlite improves drainage and aeration. It repels water and creates air pockets around roots between irrigations. Vermiculite retains water and holds nutrients. It absorbs moisture and slowly releases it back to roots. Perlite is the correct choice for hydroponics. Vermiculite retains too much moisture and reduces the oxygen availability roots need. In coco mixes, perlite at 20 to 30% improves drainage and prevents waterlogging. This is the standard approach for most Australian growers. Vermiculite is better suited to seed starting mixes and... Read more...
Pumice vs Perlite: Which Growing Medium Is Right for Your Hydroponic Setup?
Quick Answer: Pumice vs Perlite for Hydroponics Australia Both pumice and perlite are volcanic in origin and improve drainage and aeration. But they perform differently in a root zone. Pumice is denser and heavier than perlite and retains slightly more moisture. Better suited to larger container systems. Perlite is lighter, drains faster, and provides more immediate air porosity. Preferred for frequent-irrigation hydroponic setups. Pumice has a naturally neutral pH and does not break down or compact over time. It can be reused across multiple grow cycles. For pure hydroponic media... Read more...
Ebb and Flow (Flood & Drain) Systems: The Indoor Grower's Guide
Ebb and flow is a versatile hydroponic system that works well with a wide range of growing media and plant types. This guide explains how flood and drain cycles work, how to set up your system, and how to optimise timing for healthy, productive plants. Read more...
NFT Hydroponics: Set Up and Optimise
Quick Answer: NFT Hydroponics Setup NFT feeds roots with a continuous shallow stream of nutrient solution along a sloped channel, while roots stay exposed to air rather than submerged. Channel slope should be set at a gradient of 1:30 to 1:40, roughly 2.5 to 3 percent, to avoid stagnant pooling or excessive flow speed. Flow rate should be a steady one to two litres per minute per channel. Consistent flow matters more than total volume. Large root mats can block channels as plants mature. Prune root tips at the outlet... Read more...
Drain to Waste Hydroponics: Dutch Bucket Setup, Pros, Cons and Troubleshooting
Drain to waste is one of the simplest and most reliable hydroponic methods for achieving consistent results. This guide covers how the system works, the best growing media to use, and how to dial in your feed schedule for maximum yield. Read more...
Hydroponic Systems for Urban Growing: DWC, NFT, Ebb & Flow and More
DWC, NFT, and Ebb and Flow are three of the most popular hydroponic systems for indoor and urban growers. This guide compares how each system works, what it suits best, and how to choose the right one for your setup. Read more...
Vertical Hydroponic Gardening: How to Grow More Food in Less Space
Vertical growing is the most space-efficient approach to indoor hydroponic food production. When floor space is the limiting factor, growing upward is the logical answer. A two square metre corner can become a surprisingly productive growing space when stacked vertically. This guide covers how vertical hydroponic systems work, what crops suit them best, and what to consider before setting one up. How vertical hydroponic systems work Most vertical hydroponic setups follow a tower or stacked tray logic. Nutrient-rich water is pumped to the top and trickles down through the root... Read more...
Clay Balls (LECA) for Hydroponics: The Complete Growing Guide for Australian Growers
Quick Answer: Clay Balls and LECA for Hydroponics Australia LECA (Lightweight Expanded Clay Aggregate) is fully inert, reusable across multiple cycles, and never compresses or degrades. Pre-soak LECA for 24 hours before first use, since dry clay balls absorb water unevenly and stress seedling roots on first contact. LECA works best in DWC, flood and drain, and Dutch bucket systems where constant root zone oxygen is available. Root zones stay more oxygenated in LECA than coco or soil, making it highly resistant to Pythium and root rot. LECA has essentially... Read more...
Perlite for Hydroponics: Complete Growing Guide for Australian Growers
Quick Answer: Perlite as a Hydroponic Growing Medium Australia 100% perlite is a viable standalone growing medium, not just a coco additive, delivering exceptional root oxygenation and drainage. Perlite has near-zero water retention compared to coco, so it requires more frequent irrigation (2 to 4 times per day in peak growth). Dry back strategy is highly controllable in perlite, with a target of 30 to 40% dry back between irrigations for optimal root zone oxygen. Perlite tolerates higher EC than coco without the same lockout risk, so run 0.2 to... Read more...