Suspended in salt water
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It’s your decision as to whether you’ll deliver the seed to the farmers you’re supplying or if you want to have them pick up their spools. There are two main methods for packaging and transferring seed spools. Although the specifics of each system might differ based on the hatchery and the distance of travel, in general, spools are either transported:
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Wrapped in damp paper towels in a chilled, insulated container

Paper towel method
One option is the dry, or paper towel, transfer method. You can take the spool, wrap it in paper towels that have been dampened in chilled, filtered seawater, and gently stack it in an insulated box with an ice pack. They are able to withstand these conditions for about 36 hours before outplanting. This is a great option when you are shipping spools or delivering a large quantity, because it is light and compact. See the video below on how it’s done. You can also refer to this Seed Spool Transportation Protocol if needed.
Paper Towel Transportation Method
Transfer tube method
The second method is the transfer tube method, where we repurpose our 4” PVC seeding tubes to secure individual spools for transfer. The tube will be filled with chilled, filtered seawater and fitted with a styrofoam ring at the top and bottom for extra stability, ensuring the spool do not bump into the walls and wipe off any blades. As long as the water in the tube stays cool (by refrigeration or using a cooler packed with ice), the spool can withstand these conditions for up to 36 hours. Some downfalls of this method include turbulence the water creates within the tubes that can cause some blades to fall off and the water weight can make it very difficult to travel with. See how we package spools using transfer tubes in the video below.

Bulk transport
The last spool transfer method is for large scale and remote operations. It is common to fill an insulated fish tote with chilled seawater and string the spools through PVC shelving to submerge the seed in water. When spools need to be transported a long distance, keeping them in an environment similar to a tank is ideal.

It’s always best practice to outplant your spools as quickly as possible! However, if the farmers you provide spools to are unable to outplant within a couple of days of delivery, you can suggest that they securely hang the spools from a dock or boat on or near their farmsite. Important considerations for this method are the salinity of the water (around 28 ppt or greater), and keeping the spools from sitting on the bottom and getting smothered by the sediment. While this method may buy the farmers some time before outplanting, it should really only be utilized for no longer than a week.