![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
I believe this water, to which they add nutrients, is treated and recirculated. They also try to use biological controls for any pest that might threaten.
© Isabel Cutler 2001-2024 - Images may not be reproduced without written permission
| comment | |
| Guest | 13-Nov-2005 14:41 | |
| G.ra Tomlin | 13-Nov-2005 14:30 | |