I recently upgraded to a 40B and I also pulled the trigger on two 1150 Koralia's which replaced my two 425 Koralia's. The 1150's were way too powerful for my tank since I only have softies and LPS. I feel like the 425's aren't sufficient, should I go with two 600's or two 850's? What's the total GPH that's recommended for a 40B softie/lps tank?