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No easy answer. Most LEDs are fine you need to tweek the background parameters to meet their needs. An sps may do poorly....yet move it 5" to the right and the color pops! Gotta figure out your garden scheme.
Added 2 mp10s to the bottom back wall of my 120 to increase flow. Already have 2 mp40s but wanted to decrease dead spots. Works pretty darn good, more random flow.
Is this straight up through the floor? Or along the lower floor, up the stairs, along the floor and into the tank? Shortest distance is a straight line.