|
You don't need a check valve if you use a 90 degree elbow at the tank inlet connected to a capped piece of pvc pipe extending to the bottom. Then drill several holes in the pipe from top to bottom. That way you get fresh water supplied at all levels in the tank. And the one at the top will act as an antisiphon when the pump is off and the water level is below it. By pointing the drilled holes along the edge of the tank (clockwise), you can create a current which will give the bait a direction to swim.
Using a 6v battery, I would go with a 500 gph pump, at least for Sardines.
|