General Hydroponics
GH Hardwater Flora Micro, Gallon
Best nutrient solution for growers using hard tap water.
General Hydroponics Hardwater Flora Micro is a specialized nutrient solution formulated for growers who use hard tap water, especially when calcium levels exceed 70 ppm or total dissolved solids are over 200 ppm. This liquid concentrate prevents nutrient lockout, ensuring your plants receive essential micronutrients for robust growth. With a 5-0-1 NPK ratio, it provides vital nitrogen and potassium. For moderate calcium levels, it can be blended with the original FloraMicro to create a perfectly balanced nutrient profile, promoting overall plant health and vitality.
$39.75
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4347
#50 in Fertilizers
Price vs Category Average
-36%
Below average
NPK Ratio
501
/ --
Who it's for
- Commercial operators needing cost-effective bulk supplies
- Growers managing high-mineral water sources
- Hydroponic gardeners using the established Flora Series
Who should skip it
- Growers wanting a low-maintenance, hands-off feeding routine
- Beginners seeking simple, all-in-one nutrient solutions
- Gardeners utilizing soft or reverse osmosis water
Performance breakdown
Hard Water Compatibility
Specifically engineered to neutralize common mineral lockout in tap water.
Nutrient Bioavailability
Ensures essential micronutrients remain accessible even in high-calcium environments.
Blending Versatility
Seamlessly integrates with original FloraMicro for custom nutrient balancing.
Concentrate Potency
High-density formula delivers significant value for large-scale growing operations.
Ease of Dosing
Liquid consistency allows for precise, mess-free measurement in reservoir systems.
Growth Support
Provides a robust foundation for vigorous vegetative and flowering development.
Key Specs
NPK Ratio
5-0-1
Weight
10.22 lbs
Dimensions
6 × 6 × 12 in
Brand
General Hydroponics
SKU
793094016131
Recommended for tap water over 200 ppm or calcium above 70 ppm
Liquid Concentrate fertilizer form
Synthetic fertilizer source
Features
- Formulated for hard water conditions
- Prevents nutrient lockout
- Blends with original FloraMicro
- Provides essential micronutrients
- Supports healthy plant growth
- Convenient gallon size
What customers say
This nutrient solution is highly regarded for its consistent quality and reliability. Growers find its hardwater formulation exceptionally effective at balancing mineral issues, making nutrient delivery straightforward even with challenging water. It reliably promotes robust plant growth, proving itself a dependable element for successful hydroponic systems. This solution simplifies the process, offering peace of mind for those seeking dependable results.
Know before you buy
You should use the Hardwater formula if your tap water has a total dissolved solids (TDS) reading over 200 ppm or calcium levels exceeding 70 ppm. Using this version in these conditions helps prevent nutrient lockout, which can otherwise stunt plant development.
Yes, you can blend the two formulas if your water source has moderate calcium levels that fall between the requirements for the standard and hardwater versions. This allows you to fine-tune your nutrient profile to match your specific water quality.
General Hydroponics Hardwater Flora Micro has an NPK ratio of 5-0-1. It is designed to provide essential nitrogen and potassium while focusing on micronutrient delivery.
No, this is a specialized micronutrient solution designed to be used as part of a multi-part nutrient system. It is intended to be used alongside other Flora series components to provide a complete nutritional profile for your plants.
No, this specific formula contains 0% phosphorus. It is formulated to provide nitrogen, potassium, and essential micronutrients, leaving the phosphorus contribution to the other parts of your nutrient regimen.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$40