[DaveK]

For a pump being used extrenally with a sump I prefer Iwaki pumps. They have been around for years, are rock solid, have parts generally available online, and are almost the "gold standard" for pumps on a reef system. They do tend to be a little more expensive.

You haven't mentioned how large a tank this is, so the pump size you need can't be determined. For an Iwaki pump, with a Japanese motor, expect to spend about $200 - $300.

There are also plenty of of the excellent pumps you can get and they usually cost somewhat less.

If it's a smaller system, an internal pump can be used. or those I'd used either an Eheim pump or an Supreme Mag pump. Price ranges on those are about $70 to $125.

Note - in the pricing examples I have left off the smaller pumps, as they are generally too small for a reef system. I have also left off the extremely large pumps because they are typically more than you would want.

Generally you are better of buying something like this online from a dealer on the net. You'll get the same thing at a much better price.