They start in a 3.5 gallon with a sponge filter.
Heavy high protein feeding multiple times (5-6) crushed flake and plankton powder daily with a water change daily until they move up to the 10 gallon with a large hydro sponge.
Then the feedings drop to 3 times a day and water changes go every second day.
They then goto the 20 long. 3 feedings a day. Twice high protein (plankton powder) once a green flake. water changes twice a week.
Then the final step. A 33 gallon with two feedings a day. High protein (food varies daily, frozen, flake and pellet) and veggie (green flake) water changes once a day.
They are ready for the store when they reach almost 3 inches. Although the store will take them at 2 inches. I have found however that the price difference I get per fish unit between 2 and 3 inches is great enough that it pays for me to keep them that time that it takes for them to grow the extra inch.