Need help with UV for 180-190g system

[xVanchOx]

Hello, I have system with total water volume arround 180-190gallons (display 130g) and have dynoflagellates which I want to defeat and also to use the UV for killing bacteria and maintaining the tank from time to time for algea, ich, etc. My lfs can get me UV 55W with 530g/h pump, my question is, is it too big Watts for my aquarium and is it the pump right flow to do the right job. I go through a lot of post about uvs but cant really underatand what exactly I need for my tank.

 

[Reefing Madness]