I have 3 modified Tunzen Nanostream, 2 6025 and 1 6045. I think each put out around 1200 GPH. However I think I need more flow. I'm looking to replace one of them with a stronger PH where the flow would make it across a 4' tank. However I don't want anything that is too big since I don't have much room and I want to be able to direct it in any direction i want to. I was thinking about a Koralia 4 but that might be too big, plus IMO it's ugly.