Anyone have any tips on how to visualize flow in a tank before you start placing corals? I have a gyre 250 and a 1” RFA at opposite ends of an inwall 180, and there’s got to be a better way than blowing fine bubbles into the return or watching where the food goes, right? Anyone using any fancy or ghetto gadgets to visualize their flow? Fake silicone anemones? Fancy photography tricks like digital particle velocimetry? Any insights would be great!