General Hydroponics and Terra Aquatica: Are They the Same Nutrient System?

Terra Aquatica and General Hydroponics are not competing brands. They are two branches of the same nutrient system, developed from the same formulation principles, and functionally interchangeable for the vast majority of growers. If you have used one, you already understand the other. This guide explains the relationship between the two and what it means for Australian growers choosing between them.

The same roots, two different names

General Hydroponics is an American company that developed the Flora Series — one of the most widely used three-part nutrient systems in hydroponic history. Terra Aquatica was established as the European manufacturing and distribution arm of General Hydroponics. Over time it evolved into its own independent brand, but it continued producing nutrient systems based on the same core formulation principles and ratios. The GH Flora Series and Terra Aquatica TriPart are structurally the same system. Flora Grow maps to TriPart Grow, Flora Micro maps to TriPart Micro, and Flora Bloom maps to TriPart Bloom. Feeding charts from either brand can be used interchangeably as a starting point, with minor adjustments based on your water quality and grow system.

Are the formulas identical

Core macronutrient ratios are closely aligned and micronutrient profiles are functionally equivalent. Minor variations may exist due to regional sourcing, regulatory compliance, or manufacturing differences, but in real-world growing conditions these differences do not meaningfully impact plant performance. If you have been running GH Flora Series and switch to Terra Aquatica TriPart, you do not need to rebuild your feeding program. Most growers report no visible difference in plant response when making the switch. No full system flush is required — just use the Terra Aquatica feeding chart as your new baseline and check your EC after mixing before feeding.

Why Terra Aquatica has become the standard in Australia

For Australian growers, the shift toward Terra Aquatica has been driven by supply chain practicality rather than any performance difference. Terra Aquatica has more consistent availability through Australian hydroponic retailers, reduces reliance on US imports and the delays that come with them, and is well-supported by local distributors across Melbourne, Sydney, Perth, and Brisbane. A nutrient system that is reliably on the shelf is worth more than a marginally different formula that is out of stock. For all practical purposes, choosing Terra Aquatica in Australia is simply choosing the locally available version of the same proven system. The Terra Aquatica TriPart Micro, TriPart Grow, and TriPart Bloom are all stocked at Apex Grow, alongside the rest of our Base Nutrients range if you want to compare it against other systems we carry.

Getting the most out of the system in Australian conditions

Regardless of which branch of the system you are running, performance comes down to managing the fundamentals. Keep pH within 5.5 to 6.5 for hydroponic systems — drifting outside this range locks out nutrients regardless of brand. Adjust EC per growth stage, with seedlings and early veg requiring lower EC than late flower. Water quality varies significantly across Australian regions, and high baseline EC or mineral content in tap water affects how you mix your nutrients. Australian summers can push reservoir temperatures into ranges that stress roots and reduce oxygen levels, so monitor water temperature closely. Both systems perform across all major hydroponic formats — DWC, NFT, drip systems, coco coir, and soil-based indoor grows.

Terra Aquatica nutrients in Australia

For the full range of Terra Aquatica nutrient systems available in Australia, browse the Hydroponic Nutrients collection.

Frequently Asked Questions

Is Terra Aquatica the same company as General Hydroponics?
They share the same origin and core formulation principles, but operate as separate entities today. Terra Aquatica began as the European manufacturing and distribution arm of General Hydroponics before becoming its own independent brand. The product systems remain structurally aligned, which is why they're functionally interchangeable for most growers.

Can I switch from GH Flora Series to Terra Aquatica TriPart mid-grow?
Yes. Flora Grow, Flora Micro, and Flora Bloom map directly to TriPart Grow, Micro, and Bloom. No system flush is required, simply use the Terra Aquatica feeding chart as your new baseline and check EC after mixing before feeding as normal.

Why is Terra Aquatica more common than General Hydroponics in Australia?
Availability, not performance. Terra Aquatica has stronger, more consistent distribution through Australian hydroponic retailers and doesn't rely on US import timelines the way General Hydroponics stock can. A nutrient system that's reliably on the shelf is more useful in practice than a marginally different formula that's frequently out of stock.

Will my plants respond differently if I switch between the two brands?
Most growers report no visible difference in plant response when switching. Core macronutrient ratios are closely aligned and micronutrient profiles are functionally equivalent between the two systems, with only minor variations from regional sourcing or manufacturing differences that don't meaningfully affect real-world growing outcomes.

Do I need to adjust my EC or pH differently for Terra Aquatica versus General Hydroponics?
No brand-specific adjustment is needed. Standard hydroponic targets apply to both: pH between 5.5 and 6.5, with EC adjusted to growth stage regardless of which brand you're running. Water quality in your specific region affects both systems equally, so check your baseline EC before mixing either one.