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.
Estas son estructuras que flotan en la superficie, de algún material plástico barato para que crezcan las algas. Llegamos a producir montones de diseños, la mayoría de ellos fueron horribles fracasos. Y cuando finalmente llegamos a un diseño que funcionó, en cerca de 110 litros, escalamos a 1700 litros en San Francisco.