Thanks to everybody who answered. The cloudiness disappeared as unexpectedly
as it appeared, so I think that after all the yeast was not a culprit,
probably some outburst of bacteria growth.

Thanks to Kelly Johnson for the advise with the second bottle. I recall
seeing a picture somewhere (at a www.thecrib.com most probably). Next
weekend I'll do this just to be on the safe side. As to on 2 l soda bottle
being not enough: maybe, but I see a very positive effect of it nonetheless.
I'll probably try to add the second bottle anyway.

Again, thanks to everybody who took time to answer.


"S.Holmes" wrote in message
...
Hello all.

I decided to try a DIY CO2 generator (soda bottle, yeast, sugar) in my
aquarium (about 63 gal). I used a valve preventing aquarium water
siphoning
into the bottle. What about the other way round? How can I prevent yeast
mixture from getting into aquarium?

Couple of days ago the aquarium became very cloudy. I suspect the contents
of the generator somehow made its way to aquarium, although the level in
the
bottle remained unchanged. How can I check if some yeast really got into
aquarium? What are other possible reasons of cloudiness?

TIA