Gel pack use

[dcarch]

Just a quick idea:

Wall O Water uses water to store heat to protect your plant from freezes. However, water is not a very good media to store heat. Salt water is slightly better then fresh water.

The next time you come across cold gel packs, don't throw them away. They are much better in keeping heat.

The physics is what's called "phase change specific heat"

You can also find them on eBay. Throw a few inside your WOW, and your plants will be much safer.

dcarch