Hydrofarms

Food Yield
For hydrofarms, food yield is only affected by centralization.

Unlike Farms, Hydrofarms are not affected by terrain penalities.

Hydrofarms, like homes, are affected by centralization, so make sure farms are near the capitol or near a colony.

Upgrade Costs
Looking at the trends above, it is more economically efficient to build new hydrofarms than it is to upgrade existing farms.
 * Hydrofarm I +(€ 12k, 300 Metal, 400 food)
 * Hydrofarm II +(€ 13k, 300 Metal, 400 food)
 * Hydrofarm III +(€ 13k, 300 Metal, 400 food)
 * Hydrofarm VI +(€ 14k, 340 Metal, 400 food)
 * Hydrofarm V +(€ 15k, 340 Metal, 400 food)