I plan on upgrading my tank in the not so distant future. I am wanting to get a 200+ gallon tank. I will probably have a 100 G refugium/sump. What i am wanting is some ideas about plumbing. My tank will be RR. Should i get 3 holes drilled or just 2? The reason I ask is because I recently learned about the benefits of Closed Loop Systems improving flow in tank. If anyone has a good diagram or something of the sort that would help tremendously!I have tried to post what my tank looks like right now but can't seem to get it. Any suggestions would be helpful