Bob Wennerstrom wrote:
I've got a 15 gallon tank with about eight platys and a pl*co in it, no
plants. I used to lose a fish every 6-8 weeks. This seemed to happen
right after water changes even though I was using that chlorine remover
stuff and only changing about 2 gallons/week. So I did an experiment
beginning last March. I stopped changing the water. In the last year I
have had zero fishes die. I'm using a Marineland Emperor, wash the
filter every couple weeks and change the filter/carbon thing about every
3 months. No UGF.

So do you think I've got wicked nitrates buit up in the tank and the
fish are just used to it? I keep reading about how important water
quality is and how important water changes are yet I get good results
for a whole year never-ever changing the water, just adding to make up
for evaporation. Carbon doesn't remove nitrates does it?

Comments?
I suppose that, by only adding make-up water required by evaporation,
the tank water may become quite hard. Platies may require harder water.
Steve