Just make sure you turn the closed loop on every day or so to flush the water though the pipes or the water will get stagnant and you don't want that water going into your tank when you turn it on after sitting.
I would also run the other holes in the back into the closed loop and run the return over the back. Also instead of using those screens n the closed loop try to find something to make it smaller. With the output being that small you wont be getting much flow out of them. That is the reason the pump isn't strong enough.
I would also run the other holes in the back into the closed loop and run the return over the back. Also instead of using those screens n the closed loop try to find something to make it smaller. With the output being that small you wont be getting much flow out of them. That is the reason the pump isn't strong enough.