I do not have that big of a budget, so PHs like the MP10 are out of my range. I currently have 2 Hydor Koralia Evolution 550s, and it just doesn't seem like enough flow. I want to have a mix reef in the future: soft corals, LPS, fishes and maybe a SPS. The tank being more focused on fish then the corals. Will a Koralia 750 be that much of a difference from the 550? Or do I need a 1050? Could I use a 550 on one side with the 1050 on the other?