Auros (![[info]](http://l-stat.livejournal.com/img/userinfo.gif){kind=small} auros) wrote, |
They don't. The point is that the algae can only grow within a few inches of a light source. So they use the pipes to make a network of lights sources, such that no part of the water is more than a few inches from a pipe.
| Auros (auros) wrote, |