I got the $65 pump from the same vendor, it works very well. It could flow a hare more, but it is definately enough for this system. It's my 3rd pump. I built my own mag drive pump from spare parts, but it flowed WAY too much, then put in a cheapo pump from Harbor freight tools. That had a good flow rate, but it was as loud as a chainsaw. The Johnson pump is so quiet, if I didn't have temp monitoring guages on the IC in/out, I wouldn't even know it was working. Quality stuff right there.