I would say to add one for the LR. I have a skilter 250 (250 GPH) and an Aquaclear 1000 (80 GPH) in my 10 gallon reef. I think that water movement is good. Ebay has ALOT of the Aquaclear 1000, 2000, 3000, and 4000 power heads CHEAP....these have been replaced with the 101, 201, etc.... but still work VERY well. I think the 4000 is like $13.00 + shipping and it's 396 GPH.