How many XR15 ?

[ufail]

Hi,

I'm setting up a new tank (47"x47"x17" DxWxH) most corals are going to be SPS. i'm thinking of putting four XR15 will be enough?

Best regards

 

[nereefpat]

They will be plenty strong enough, especially in your shallow tank, but I think you'll be lacking in coverage. The recommended spread of those is about 18" x 18".

I'm not a Radion user, however, so we'll see what others say.