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Cold packs or gel packs for shipping?

927 Views 6 Replies 4 Participants Last post by  Soothing Shrimp
I've used 72 hour heat packs successfully to ship shrimp in winter, but I am looking for a good way to do it in the summer. What kind of cold packs are out there? I have seen some gel packs available which are supposed to regulate temperature. Has anyone used one of these?


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I've never used the Phase 22 packs but I have read reviews and seen them for sale on a few different sites.
The phase 22 gel paks work great in the summer but you have to make sure their not touching your breather bag as this can be toxic.
the phase 22 seems like the ultimate product. Keeps warm only to a certain degree- so now no overheating in the box- especially when sending from one climate to another.

Keeps cold to a certain degree- so no worry about freezing.

It's almost like you could include that in every shipment as a sefguard to maximize shrimp protection.

I'm very interested and am looking into this more.

How many would be recommended for what sizes of boxes?

Why is it toxic if touching the breather?
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Based on size I think one would be enough in a normal 7x7x6 box?


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the phase 22 seems like the ultimate product. Keeps warm only to a certain degree- so now no overheating in the box- especially when sending from one climate to another.

Keeps cold to a certain degree- so no worry about freezing.

It's almost like you could include that in every shipment as a sefguard to maximize shrimp protection.

I'm very interested and am looking into this more.

How many would be recommended for what sizes of boxes?

Why is it toxic if touching the breather?
I'm not sure why it is toxic, but my experience that if you put it right on the gel pack without any barrier the water tends to cloud and the shrimp will perish. I wrap them in a plastic bag and put a little insulation between the shrimp and the breather bag and never had a problem that way. I like to use them when I'm shipping from cold to hot areas and from hot to cold since they self regulate around 72 degrees.
Excellent info. Thank you.
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