01-01-2007, 08:46 PM
| || | Sounds like a case of Cryptocoryne rot.
I was reading this information.
http://www.thekrib.com/Plants/Plants/crypts.html However, the information is based mostly on Crypts rather than the Echinodorus but I think it can be possible. I had Cryptocoryne rot before and it killed most of the Cryptocoryne crispatula. That was 3 years ago though.
A lot of things can cause crypt rot. I think a better name for the |
condition is "meltdown". I don't think it is a bacterial or viral disease
because the plants can, and almost always do, recover completely.
Going from low CO2 to higher CO2 can cause it, especially if the light is
low. When the light is increased along with the CO2, the meltdown is very
going from a very low nutrient supply to a higher one can cause it.
However, if you keep the nutrient levels higher, the plants will recover
and grow well.
If you have been growing your crypts without any fish, and then you add a
fish or two, meltdown will often occur.
If another plant, such as Hygrophila is 'taking over' the tank, the crypts
will sooner or later have a meltdown.
if there are no water changes in a tank for a long time (a year or more),
meltdown is likely.
Something decaying in the tank, such as a dead fish, can sometimes set off
a meltdown, especially if the amount of decay is enough to make the water
Crypts are more sensitive to meltdowns from a variety of causes when they
are crowded in a tank, as opposed to being sparsely planted.
Meltdowns do not kill crypts, provided that the decaying crypt leaves do
not lower the oxygen content of the water so much that the rhizome is
killed. If you can keep the water aerobic, the rhizome always lives and
soon sends up new leaves.