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#1
07-02-2015, 06:15 PM
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Freeze some water bottles and float them but take some water out so they don't burst in the freezer of course.
Those cooler freezer packs would worry me. What's in there anyway. Whatever it is I don't want it leaking from a cheap manufacturer seal. Last edited by NU-2reef; 07-02-2015 at 06:18 PM. 
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#3
07-02-2015, 06:26 PM
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Probably a calculation somewhere, but would include water temp, ice temp, air temp, surface areas of those parameters. Not something you work out in your head. Trial and error, unfortunately.
__________________
Brad
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#4
07-02-2015, 06:45 PM
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i threw in about 10 water bottles (didn't drain any water and they never burst in my freezer). took about 2F off my tank temp and quite fast too. took about 10 min for ~ 130 gallons. too fast for my liking and my hot main floor (29C) raised the temp back up in less than an hour. a fan on the display is a better idea i was just too lazy to set one up.
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but ziploc freezer bags won't burst
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