The tank is a 20L and so I bought a 600l/hr pump thinking this would hold enough pressure to complete the circuit of tubing however in my out of tank tests it didn't seem to be powerful enough and the shop won't accept the return 
so I was thinking of adding a 300l/hr pump going in a opposing direction so there is a counter flow that will hopefully let the entire circuit be used. Would this cause problems? There are vents in the pipe to relieve the pressure so there shouldn't be an explosion from the pressure 
so I was thinking of adding a 300l/hr pump going in a opposing direction so there is a counter flow that will hopefully let the entire circuit be used. Would this cause problems? There are vents in the pipe to relieve the pressure so there shouldn't be an explosion from the pressure 
