Gti_Leo
Aquarium Advice Addict
RandJ you are best to put a Y on your return pump and have at least one side of the Y all the way open (probably the one going up) and then you open the other side until you reach the desired flow rate... or you start with them both open and you close the "sump return" until the "tank return" is at the right flow rate. It's better for the pump that way... but If Leo has a way to increase your overflow rate and you want more flow in your tank (most tanks do) you should do that first and then if you still need to slow down the flow to your tank, you should try my suggestion.
lol i have no way to increase flow, maybe get bigger bulkheads or just get a smaller pump
How do I adjust the flow rate of my overflow though? Thats what has me stumped.
isn't there an adjustment of the height of the overflow? if i've read right all HOB overflows have a eight control to increase and decrease the flow rates