System Optimisation

Fish to Plant Ratios

Reference guide for balancing fish and plant ratios, plus AI-powered personalised advice for your specific system.

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Reference Guide

Tilapia

10–20 kg/m³1 kg fish : 7–10 plants

Leafy greens, herbs

High waste producers — great for heavy feeders like tomato, basil.

Trout

15–25 kg/m³1 kg fish : 8–12 plants

Lettuce, herbs, watercress

Cold water (12–18°C). High DO requirement. Suits media bed or DWC.

Goldfish / Koi

3–8 kg/m³1 kg fish : 5–8 plants

Most leafy greens

Lower stocking density. Good for beginners and ornamental systems.

Catfish

10–30 kg/m³1 kg fish : 8–15 plants

Fruiting crops, leafy greens

Tolerates lower DO. Fast growing. Good for high-demand crops.

Perch

10–20 kg/m³1 kg fish : 7–10 plants

Herbs, lettuce, chard

Slower growth. Quality food fish. Great for temperate climates.

Carp

10–25 kg/m³1 kg fish : 8–12 plants

Spinach, watercress, kale

Hardy and adaptable. Tolerates variable conditions.

Bass

10–20 kg/m³1 kg fish : 6–10 plants

Tomatoes, peppers, herbs

Warm water fish. Aggressive feeder — suits fruiting systems.

Prawns / Shrimp

50–200 g/m²Supplement to fish system

Most herbs and leafy greens

Clean up detritus. Usually combined with fish in polyculture.