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Re: heat packs in fall shipments?
If the night time temparature is to be in the upper 40's a heat pack is
usually not needed. I have sent fish using an indoor/outdoor hi/lo
recording thermometer and the box usually reaches within a degree or two of
the outside temp if any time on the gurond is needed. No problem down to 45
degrees fopr many, but for all killies I can't say. I had a female scheeli
reach 39 outside this fall (she was hiding well when I brought them in) and
although a little grateful to be finally found, she was none the less for
wear and tear.
Less durable species (sorry I can't speculate on which) or rare ones are
probably best done by biting the bullet and paying express.
As I understand heat packs, they are really just some form of Iron or other
metal powder that oxidizes and gives off heat as it does. Usually one
covers part of the pack to restrict air to the pack and thus slow the
heating to last for a longer time. In between two styros should be very
effective I would think.
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