Well this is tricky one. I've used pumps in my test setups from about 60gph to about 450gph both inline and submerged and if you are using a heater core low flow rate is fine. The only reason for high flow rate is if you are using a mulitpass high drop radiater like the old dd super cube which I also have. that style of radiator requires high flow because it will kill your flow.
As to the question on pumps that is also wrong an ehiem is good ( I havethe 1250 ) but It's not always needed. The only pumps to always stay away from are the dc pumps. They will die whithin a few months if used 24/7.
|