copied from the sticky... maybe this needs modified...lol
In order to provide your ATF the conditions it needs to thrive, you need powerheads, a bubbler, a bubble stick and a very big tank. To achieve a sufficient level of current for your fish, the formula I use and recommend is to take the volume of your tank in gallons and multiply by fifty and this is your ideal level of current. For a 150 gallon tank, the recommended amount of flow would be 150 x 50 = 7500 gallons per hour for an ATF to thrive. For example, the 150 gallon growout in which I currently house my young Goliath ATF has 8,850 gallons per hour of current.