Ai prime on fluval flex

[Isiah1820]

As the title says I have a fluval tank with dimension of 32.5 x 15.35 x 15.75". Would I benefit from adding a second ai prime? I notice dark spots in the corners and don’t want to only be adding corals in the middle of the tank. And is the depth of the tank Ok to put coral on the sand bed?

 

[fishski13]

I think you sort of answered you own question. you say you see dark spots and you want to add corals not only in the middle of the tank, so you would definitely benefit from a second light and be happy with it. You can definitely do coral on the sand bed with an ai prime with the right intensity.