These were the structures that would be floating at the surface made out of some inexpensive plastic material that'll allow the algae to grow, and we had built lots and lots of designs, most of which were horrible failures, and when we finally got to a design that worked, at about 30 gallons, we scaled it up to 450 gallons in San Francisco.
Det er disse konstruktioner der ville flyde på overfladen, og de ville være lavet af noget billigt plastik, der tillader algerne at gro, og vi havde bygget masser af forskellige designs, hvoraf de fleste var frygtelige fejltagelser. Da vi endeligt fandt et design der virkede med omkring 110 liter, skalerede vi det op til omkring 1700 liter i San Francisco.