How big is your tank? If its small there might be yeast somehow ending up
in the tank and giving the tank a yeast infection. Probably best not to use
Co2 on tanks less than 80l(~20g?). Make sure the Co2 is above the waterline
esp if you don't have a check valve. Fertilisers added in the morning do
make the water a bit cloudy initially but shouldn't be milky as you
described. Is it an established tank ie you've have it set up for three or
more months. Anything less and the tank could still be cycling.

"RifRaf" wrote in message
...
I've been fighting what I *think* is a bacterial bloom for abour the
last 1.5 weeks.

The water looks milky and even after large water changes goes back to
being cloudy after about a day.

A pattern I noticed tho was that the water steadily got clearer
througout the day and then in the mornings when I turned the light on,
the water was MUCH cloudier...again.

So...as an experiement, I unplugged my DIY CO2 at night when turning
off the lights.

In the mornings, it's still as clear as the end of the previous day
(which usually ended up looking fairly decent).

So...is there a connection here between running the CO2 at night and
it somehow contributing to the cloudy water?

Chris


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