08-31-2009, 01:37 PM
| || |
As you can see from previous replies, we have a lot of different plants. There are two aspects to this, faster in the sense of using nutrients, and faster within each species. Some plants naturally grow faster, namely the stem plants. Rooted plants tend to be slower in growth. Floating plants can also be faster in most cases. Aside from this, there is some variance within individual plants resulting from the light and nutrients that are available for photosynthesis.
Faster growing plants pull nutrients and ammonium out of the water faster (and consequently require more light and perhaps CO2 diffusion to balance), and require more maintainance (pruning stem plants, removing large floating plants) to maintain the appearance you want. Rooted plants tend to stay where you plant them and the growth rate of new leaves will depend on the light and nutrients. Some like Echinodorus (swords) are heavy feeders and produce leaves much faster than Aponegeton or even moreso Cryptocoryne (crypts). Anubias
tends to be very slow growing, and as a result it tolerates lower light much better.