Questions - Need some input

Firstly I'm new to Reef Addicts. I have some experience with salt water. 55G Fish + Reef. 12G Nano and currently a 6G Nano with 2 clowns mated. 2 inches of sand and LR. There are some shrooms growing on the LR and some hard green hair algae.

I'm building a new custom 80G (360 degree view) center overflow and returns so all pipes hidden. LED's etc and a lifereef system below.

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