flow through chiller design

[sucker_dave]

Hi, I'm new to this forum. I'm in the wholesale bait busniess and I'm in the need for a large flow through chiller. Of course like most people I just can't see paying someone to prepackage a system for me. However not being familiar with refridgeration, I'm stuck. Hopefully someone here can help me out. I'm not trying to steel anyones designs and make money off them, just trying to save myself some $.

the system I'm looking at is made by
Aqualogicinc
I've attached a picture.

The system consists of a large air conditioner connected to a Tube-In-Shell titanium fluid heat exchanger. A digital electronic controller is used to regulate the temp. in the coil by turning on and off the unit. There also appears to be a flow switch that will shut down the system when water stops flowing.
I have been able to find all these parts so far on the web. Many from this site.

My question is, Am I missing anything? any help would be greatly appreciated.

thanks!