Hi I have a waterbox 25 (23.6" x 15.7" x 15.7") I am currently using a fluval marine 3.0 22w which I feel is not giving me enough light I also don’t like how it sits on the tank and would rather something on a arm. Would I be better buying a brand new Ai prime 16hd with flex arm for £265 or would I be better buying a second hand Ai hydra 32 with the arm for £250. I have soft coral and LPS thanks Zak