So I have a Red Sea 425xl and a pair of MP 40s. I have plenty of flow I. The upper column to keep detritus afloat but the problem seems to be I can’t keep the sand bed free of detritus no matter how low I set them. What are other 425xl wonders running? I’m thinking of replacing g them with a pair of Red Sea reef wave 25s. Thoughts? Opinions? What do you run?