Maintaining the right General Hardness (GH) in your aquarium is essential for the health of fish, shrimp, and aquatic plants. GH refers to the concentration of calcium and magnesium ions in water, which plays a crucial role in osmoregulation, molting, and overall vitality of aquatic life. This guide presents top products that effectively increase GH in freshwater aquariums, along with their features, helping you to find the best supplements tailored for your tank’s needs.
| Product | Brand | Key Feature |
|---|---|---|
| Brightwell Aquatics NeoTiger KH+/GH+ Mineral Supplement | Brightwell Aquatics | Balances hardness with essential minerals for shrimp and plants |
| Brightwell Aquatics Caridina GH+ Mineral Supplement | Brightwell Aquatics | Restores minerals in soft RO/DI water with ideal ratios for shrimp |
| Continuum Aquatics Flora Viv GH+ General Hardness Booster | Continuum Aquatics | Converts soft water into natural environment with trace minerals |
| SunGrow Shrimp Balls Aquarium Water Conditioner | SunGrow | Supports shrimp health and plant growth with essential minerals |
| SL-Aqua Black More GH Conditioner for Bee Shrimp | SL Aqua | Enhances osmoregulation and molting with essential minerals |
Brightwell Aquatics NeoTiger KH+/GH+ Mineral Supplement

Brightwell Aquatics NeoTiger KH+/GH+ Mineral Supplement is designed to balance hardness specifically for Neo Caridina and Tiger shrimp in RO/DI water. It replenishes essential minerals including calcium, magnesium, potassium, and sodium which support osmoregulation in shrimp, plant health, and fish vitality. This mineral blend also contains added silica that boosts root strength for planted aquariums. It is ideal for maintaining a stable aquarium ecosystem where purified water is used, helping to replicate natural mineral content.
Brightwell Aquatics Caridina GH+ Mineral Supplement

The Brightwell Aquatics Caridina GH+ Mineral Supplement effectively remineralizes extremely soft or purified water often used in shrimp breeding and biotope aquariums. It delivers a balanced ratio of calcium, magnesium, potassium, and sodium essential for shrimp molting, osmotic balance, and robust plant growth. This product maintains ideal GH and Total Dissolved Solids (TDS) without changing carbonate hardness (KH) or pH, making it appropriate for sensitive freshwater ecosystems.
Continuum Aquatics Flora Viv GH+ General Hardness Booster

Continuum Aquatics Flora Viv GH+ is a powdered general hardness booster for freshwater and planted aquariums. It contains a blend of calcium, magnesium, potassium, and trace minerals essential for sustaining healthy aquatic life. This supplement converts soft filtered water into a more natural environment that ensures the long-term health and vitality of fish, shrimp, and plants. Maintaining proper GH and TDS levels is vital for metabolic functions and enzyme activation.
SunGrow Shrimp Balls Aquarium Water Conditioner

SunGrow Shrimp Balls provide a nutritious blend of essential minerals such as iron, manganese, calcium, and magnesium that promote overall shrimp well-being. These conditioner balls support successful shedding, enhance vibrant coloration, and increase survival rates. Additionally, they support plant growth in aquascapes through their slow-dissolving mineral release. Suitable for smaller tanks, they help maintain balanced mineral content for active, healthy shrimp and lush aquarium plants.
SL-Aqua Black More GH Conditioner for Bee Shrimp

SL-Aqua Black More GH Conditioner is formulated specifically for freshwater bee shrimp and other sensitive invertebrates. It contains key minerals that help maintain osmotic pressure essential for healthy molting and exoskeleton formation. This conditioner supports optimal aquatic conditions by stabilizing hardness levels, thereby enhancing shrimp vitality and reducing molting stress. Its targeted mineral profile makes it suitable for shrimp-focused aquariums requiring gentle but effective GH enhancement.
Buying Guide for Increasing GH in Aquariums
Choosing the right product to increase General Hardness (GH) depends on several important factors to ensure success and safety in your aquarium setup.
Understanding Water Parameters
- Test Your Water: Before selecting a GH supplement, test your aquarium water using a reliable GH test kit to determine current hardness levels.
- Identify Water Source: RO/DI or soft water lacks minerals and requires remineralization to achieve suitable GH. Untreated tap water may already have adequate minerals.
Target Species Requirements
- Shrimp and Invertebrates: Shrimp require stable GH and mineral content for molting and osmoregulation. Products formulated for shrimp include ideal ratios of calcium, magnesium, and potassium.
- Planted Aquariums: Plants also benefit from minerals that support enzyme function and root development. Select supplements that include elements like silica and trace minerals.
Effect on Other Parameters
- Karbinate Hardness (KH) and pH: Some supplements affect KH and pH. If stability is important, choose GH enhancers that do not alter these parameters significantly.
- Total Dissolved Solids (TDS): Maintaining ideal TDS levels contributes to overall aquatic health; balanced mineral supplements help in this regard.
Form and Dosage
- Liquid vs. Powder: Liquid supplements provide ease of dosing and rapid mineral availability; powders are cost-effective and allow custom dosing.
- Concentration and Coverage: Check product concentration and recommended dosage volume relative to your tank size to ensure adequate mineral supplementation.
Safety and Compatibility
- Non-toxic Formulation: Use products that are safe for fish, shrimp, and plants without introducing harmful chemicals or heavy metals.
- Compatibility with Other Treatments: Ensure supplements are compatible with existing water conditioners, fertilizers, and medications used in the aquarium.