I have used an undergravel filter and had no worse luck growing plants than
I did without it. I think the general opinion is that while UGFs don't
harm plant growth, in no way do they improve plant growth.
As a side note- Several years ago in Aquarium Fish Magazine, there was an
article that discussed the use of kitty litter for growing aquatic plants.
Kitty litter is a lot like an UGF- it doesn't hurt the plants, but it
doesn't help them either. The author stated that kitty litter doesn't
contain any nutrients beneficial to plants. There is actually a potential
for harming the plants if you make the mistake of buying a perfumed brand
of litter.
Travis Haas
Hazel Green, WI
/-----------------------------------------------------------------------------
/"Unless stated otherwise, comments made on this list do not necessarily
/ reflect the beliefs or goals of the North American Native Fishes
/ Association"
/ This is the discussion list of the North American Native Fishes Association
/ nanfa_at_aquaria.net. To subscribe, unsubscribe, or get help, send the word
/ subscribe, unsubscribe, or help in the body (not subject) of an email to
/ nanfa-request_at_aquaria.net. For a digest version, send the command to
/ nanfa-digest-request_at_aquaria.net instead.
/ For more information about NANFA, visit our web page, http://www.nanfa.org