Starting Over

Well after some serious consideration my tank has not been improving very much after some heavy water changes, the mistakes helped me a lot and a couple of months ago my tank looked very good. But now not so much so i decided to start over.
My question is what should I do to make sure that I start over right, some info on my tank is, it is a 180 gallon tank with a tidepool module two sump. About 200 pounds of live rock. Then a hamilton metal halide fixture 3 250 watts mh and 2 vho 70 watt actinic lights. Any more info I can put on all you have to do is ask.

 

What is wrong with the tank???

 

Nitrates and Phosphates and an algae problem, i know these could be fixed by I have been trying to fix them for years. I just made every mistake you could make in the beginning and they are hard apparently to fix.

 

do u use rodi?

 

Yes I do I use a 100 gpd buckeye supply rodi unit with a pressure gauge.

 

What substrate did you use?

 

95 percent live sand 5 percent crushed coral that I cant get to.

 

my algae is getting better, even without a fuge. While my fuge was running it made a huge difference