I was wondering if anyone used a system of wort chillers where the tap water is passed through a chiller that is immersed in say, an ice bucket full of ice-cold water, before going on to the wort chiller immersed in the wort? The idea being to get the water flowing into the wort chiller much cooler than from the tap.
Has anyone tried this, and if so, did it reduce your times significantly or not really worth the effort / money. Me thinks this is probably a bit overkill, but while doing some research before going out and buying one, I noticed a lot of threads where people complained their chillers were still taking a long time to bring the wort down to pitching temps.
I have been having difficulty in a very hot, tropical climate getting my wort down to pitching temps in any reasonable time (ie less than an hour), so for my last brew, I sat in my backyard pool with my brew-pot and swam around for 20 minutes to drop the temp down to around 100oF before putting it in an ice-bath in the kitchen. It worked ok, but is not too practical hence the research for a wort chiller.