as far as the graph on the "new operational modes" sheet, it looks like Lagoon random is much stronger than Reef Crest, Lagoon Random oly goes as low as 20% of max speed for a short amount of time every half hour, and it stays between 60%-80% for most of the hour cycle....and in Reef Crestevery two mins or so it drops down to 0%...so I think according to that sheet Lagoon random would provide a higher GPH for a longer chunk of the hour cycle...