OK, I am back - I looked up as many as I could and found the same thing with all the smaller ones. I looked at those since you stated it was for the smaller tank
No pump on all the ones I found
John
"Critics are men who watch a battle from a high place and then come down and shoot the survivors." Ernest Hemingway
How warm is your tank? If it's not more than 80 I would not use a chiller. They use a lot of electricity. I have to use one because my tank would be around 85 without one. Small little cheap fans work the best on smaller tanks.
If I leave the tank closed all day it will get to 80. But I beat once I get a sump put on and fan like you said I will be fine.
29g Macro Tank
For nano's, there's always the IceProbe chiller. There's no fans so no noise, but you got to drill the tank or sump for the cooling probe. It may work for your application. If not, 1/15th - 1/10th hp size should work.
There's also the Coolworks Microchiller that doensn't require any drilling and does come with a small powerfilter to move the water.
I've had 3 chillers over 15 years and haven't seen one that comes with a pump either.
I refuse to join any club that would have me as a member.
Groucho Marx
Some dont need a pump, which is a drop in style chiller. You literally set the coil into the water to cool it. The others require a pump, rated for their flowthrough, and no more.
200g-No Corals Yet!
I had an Aquanetics drop in style for my first chiller. They work well, but the flow through designs are much more efficient.
I refuse to join any club that would have me as a member.
Groucho Marx
as long as your return pump fits in the flow rate of the chiller why not just plumb the chiller inline with your return so no need for second pump ?