I'm stuck between using a plate chiller I have recently acquired, which would require me to purchase a pump, or using my two immersion chillers, dunking one in an ice bath. For those who've done the ice bath routine, how quickly does it cool 5-6 gallons? Straight up immersion chiller uses too much water for my comfort (and wallet, water is expensive here). I have never used a plate chiller before and would have to buy a pump to use it. I'm not against this, but it would change up my "system" more than simply using two immersion chillers coupled together.