What is the real setup cost for a biofloc fish farming tank in India?

Be cautious before you invest, because biofloc is capital heavy and technical, and beginner failure rates are high. A single round PVC tarpaulin tank of about 4 metre diameter and 1.2 to 1.5 metre depth, with iron mesh frame, aerator pipes and a blower, commonly costs in the range of roughly 30,000 to 60,000 rupees per tank, and the figure varies a lot by material quality and region. A small unit of 5 to 7 tanks with a shed, blower, generator backup and water source can run into a few lakh rupees. The blower and round the clock aeration are not optional, because if power or aeration fails for a few hours the fish can die. Treat any single sales pitch with caution and get costs verified locally from more than one supplier and from your district Fisheries department before spending. Start with one or two tanks to learn, not a full farm.