Its a feature that is oft requested. Planted Tank now supports Tapatalk!
For more information you can visit
http://www.tapatalk.com
Tapatalk is free for us to install and free for those users who simply want browse in a convenient, easy to read fashion. For editing and positing privileges tapatalk has a paid version which is $2.99 as of April 19, 2010.
Once you have downloaded the application on your respective mobile device, simply search for "Planted Tank Forums".