I had a thought, if you added some more length to the soaker hose, you might be able to get your pump pressure down further and put more CFM through the diffusers. Your system is at a point on the pump curve that for every 1/4 psi you can lose, you gain about 1/4 CFM...

More CFM through the diffusers means more water movement means better oxygen in the water. And, the pump would not be working as hard.


Fish on!,
Noel