Yes, check the pipes on your chiller and and inspect your filter. If there is no logical place you can run it through your filter, you will probably need a powerhead pump (cheap from ebay), or even a pet store for around $30. I'm 90% sure you need a canister filter for the filter method... if you have a submersable filter probably not.
heres a good ausie seller for pumps i got mine from, very reliable and cheap.
2010croally71 | eBay
Remember this ratio to figure out the right litres/hour pump you will need for the size of your tank (it should turn the water over 3-4 times an hour):
Multiply the length x width x height measuring in centimetres and divide by 1000 to get the capacity in litres:
- example: 60cm x 40cm x 40cm = 96000. 96000 / 1000 = 96 litres
Now multiply this by 3 and then by 4 to get an approximate flow rate range for your filter.
- example: 96 x 3 = 288, 96 x 4 = 384
In this example a suitable filter would have a flow rate of 300-400 litres per hour.
attatched is the pump in action, the black thing at the bottom of the right tube is the powerhead, wich pumps the water through the chiller, and the left tube is the water returning to the aquarium. So you create a cicut running cool water through your tank, it goes pump >tube > chiller > tube > aquarium.
remember to soften the flow out of the chiller with something though, axies dont like current. Use a spray bar or put some ornaments in front of it.