On Mon, 9 Dec 2002 23:47:18 -0000, "lynsey"
wrote:

What are the advantages/disadvantages to an undergravel filter?
(especially when growing plants)

Thanx,
Lynsey.



Disadvantage is the roots get tangled in them. Makes it hard to
move plants or remove plants. As far as advantages I can't think of
any that over come the major disadvantage.