Also consider that testers of blocks and radiators usually use pumps that may not be typical for "in case" watercoolers. Joe uses the Hydrothruster and could get nearly 3 GPM, and I believe BillA uses a Little Giant and also can get about 3 gpm in a loop. People need to carefully choose the pump that they use if they want high GPM flow rates. The hydrothruster 500 GPH pump and the Little Giant pumps will push water through restrictions much better than any of the Danners or Eheims. The Hydrothruster just flexes its muscles and increases power when it encounters flow resistance, but eheims and danners simply can't. You need to look at the max PSI the pump can handle and not the GPH flow rate in unrestricted systems. I am in particular looking at the 500GPH Little Giant for its cost/performance ratio. Who cares if it fits in the case!
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