Aquarium Stocking Calculator Aquarium Stocking Tool Bioload and compatibility analysis. 1. Tank 2. Add Fish 3. Report Define Your Tank Volume Tank Volume (US Gallons) Select Fish Species Species / Name Adult Size (Inches) Quantity Add Fish to Stock Stocking SummaryTank Capacity:20 GalTotal Fish Load:0.0“ Tank is EMPTY. Customized Insights & Tips👋 Welcome to the Stocking ToolStart by adding your fish to see customized bioload tips and compatibility advice! Current Fish StockSpeciesQty.Total (“)Del.No fish added yet. Download Stocking Report (PDF)