Hey brother. I'm in Tampa also and have had problems in the past dealing with tap water temps for cooling. I did the prechiller thing for awhile, but it isn't really effective. My advice is to spend your cash on a small aquarium pump ($15 w/ shipping on ebay) and recirculate ice water through your primary chiller once you've stabilized temps with the tap water (after 85 F). Once I hook up the ice water/pump...the wort will once again blast through the plateau and get you where you need to be real quick.
But, if for some reason you still want a pre-chiller, I have one I'll sell you. Its sitting in my closet and, being local, you can save on shipping.
