I'm wondering if anyone can give me an idea what the "typical" lifespan of
Pseudomugil gertrudae might be in captivity? The reason I'm wondering this
is that I acquired a small school of them at the beginning of last year, and
since then their numbers have dwindled such that of the original 9, I now
only have one male left. Most of them died/vanished over the last few
months, which leads me to wonder if they're a short lifespan fish. They did
produce some fry over the Oct-Dec period, but I wasn't able to keep any of
the littlies alive to adulthood either. *sad look*
Am I doing something wrong? I'm keeping them in a 220litre planted community
tank with other quiet and peaceful fish such as rummynose tetras,
bristlenose catfish and clown loaches. I do a partial water change and clean
the filter every 1-2 weeks (I aim to do so weekly, but don't always get
time) and I regular test the water for pH, ammonia, nitrates and nitrites
(the results generally come up pretty much optimum). To me the setup looks
pretty decent, which is why I'm wondering why I'm losing all my P.
Oh, I've recently added a small school (7) of P. signifer. My P. gertrudae
swim around happily with them and I see no signs of aggression between the
two species so I doubt that is a factor, but I thought I'd include the data
just in case.
Anyone got any ideas regarding what's going on here?