Aquaponics System Sizing Calculator

For media-based systems, a 1:1 ratio of fish tank volume to grow bed volume is standard. For deep water culture (DWC), the grow bed water volume is typically 2-3 times the fish tank volume. NFT systems need less grow bed volume but more frequent water cycling.

The general rule is 1 pound of fish per 5-10 gallons of fish tank for tilapia, or 1 pound per 20-30 gallons for less hardy species. Start with 50% capacity and increase gradually. Overstocking leads to poor water quality and fish stress.

Leafy greens (lettuce, kale, chard, herbs) grow excellently and are the easiest to start with. Fruiting plants (tomatoes, peppers, cucumbers) need a mature system with high fish density. Avoid root vegetables in media beds as they compete with beneficial bacteria.