Dennerle Plants Liquid

A complete iron and trace element fertiliser for community and low-tech planted aquariums — safe for shrimp, crayfish, and snails.

Dennerle Plants Liquid is a precision-formulated liquid fertiliser containing iron (Fe), potassium (K), magnesium (Mg), and a full spectrum of essential trace elements. It is designed specifically for aquariums with few plants and a significant fish population — where the fish naturally provide sufficient nitrate and phosphate, and what the plants actually lack is iron and micronutrients. Adding nitrate or phosphate in this context would fuel algae rather than plant growth; Dennerle Plants Liquid addresses the real deficiency without creating new problems.

Safe for all invertebrates including shrimp, crayfish, and snails — making it one of the most reliable fertiliser options for shrimp-planted community tanks.

Key Benefits

• Contains iron, potassium, magnesium, and essential trace elements
• No nitrate or phosphate — ideal for fish-heavy tanks where N and P are naturally sufficient
• Supports robust, healthy green plant growth
• Safe for shrimp, crayfish, and snails
• Suitable for low-tech and community aquariums
• Available in 125ml and 300ml

Nutrient Declaration

Per 10ml in 100 litres of water:
N: 0.0 mg/l — P: 0.0 mg/l — K: 0.8 mg/l — Mg: 0.4 mg/l — S: 0.9 mg/l
B: 0.004 mg/l — Cu: 0.006 mg/l — Fe: 0.07 mg/l — Mn: 0.04 mg/l — Mo: 0.002 mg/l — Zn: 0.002 mg/l

Dosage Guide

1 pump stroke = 2ml per 20 litres. For a 100 litre aquarium:

• Without CO₂: 10ml per week
• CO₂ + low light: 2ml per day
• CO₂ + high light: 4ml per day

Divide the weekly dose by 7 for daily dosing. Recommended alongside a weekly 25–50% water change.

FAQ

Does it contain nitrate or phosphate?
No — it is designed for tanks where fish provide sufficient N and P naturally.

Is it safe for shrimp?
Yes — fully safe for shrimp, crayfish, and snails.

Can I use it daily?
Yes — divide the weekly dose by 7 for daily dosing, or use a dosing system for greater precision.

Ideal For

Community aquariums with a moderate to high fish population and low to medium plant density. Low-tech planted tanks where CO₂ is not used. Shrimp-planted community setups where invertebrate safety is a priority.

For heavily planted tanks with fewer fish, consider Dennerle Plants Liquid Plus which adds nitrate and phosphate to the formula. Both products can be combined to fine-tune NPK and iron levels independently.

A trusted fertiliser from one of the most respected names in planted aquarium care — formulated with precision, not guesswork.