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Cyanobacteria, doxycycline and azolla
I'm starting to get a cyanobacteria outbreak in my 10gal, moderate
to heavily planted tank So far it is mostly on the
roots of the floating Ceratopteris in my tank but I'm sure it will
probably spread soon. Having seen that erythromycin is the common
cure I have a couple questions.
I have a bunch of leftover Doxycyclene tablets from my trips to
Southeast Asia (its a Malaria preventative among other things).
Since it is an antibiotic I assume it will kill cyanobacteria.
However I don't know if it has any particular affect on fish. Does
anyone have experience with this? For the time being I took out
the ceratopteris and put it in a bowl with some doxycyclene, but if
the outbreak spreads it will get onto planted plants and hardware
that I can't easily separate from the tank so I may have to do
something to the tank itself soon.
On this note, I have some Azolla fern in my tank (yes, I actually
like it and duckweed, I'm a botanist!). I've gotten to wondering if
the fact that it has symbiotic cyanobacteria in its cells could
contribute to cyanobacteria outbreaks (e.g. the leaf gets damaged or
the plant dies and the cyanobacteria heads out on its own). Anyone
have knowledge about this (hard data's great but I'll take
anecdotes too!)? If people think Azolla could contribute to
outbreaks then I'll probably get rid of it.
kyle at onebox_com - email
(707) 583-2064 x2092 - voicemail/fax