Shipping susswassertang is easy

get a ziploc bag(or the ones you can seal. )
throw susswassertang in.
drain the water, so its not dripping. (prevents rot)
seal the bag almost the entire way.
Blow into gap, so the bag inflates. (free CO2!)
Seal on all sides with packaging tape!
throw in a box for shipping
seal box... etcetc