I have a 2dtx1ft with a fluval 2. I keep three small fish in it and I
have the pump pushing like so

------------
|CP|
|\/ \/ ^|
|\/Pl|
|__________|

P= Pump
pl= plant
C= castle

which looks OK on my screen, but will probably look screwed on
everyone elses. The water flow is broken up by the castle & plant
which slows the flow, but more importantly pushes it down. This
oxygenates the tank more, and I have recently noticed green algae
growth around the tank (which I believe indicates good air flow? -
please don't say I'm wrong)

To begin with, the fish battled with the flow, but now they seem quite
happy. I think it was a little bit of a workout, but eventually they
showed less levels of stress (poop analysis) and are happy slowly
floating & picking at the gravel around the bottom of the tank as I
type.

"astropeak" wrote in message . net...
How does the current produced by the filter affect goldfish? I have a an
Aquaclear 200 filter in a 20 gallon long tank with two small goldfish. Is
this going to affect them adversely, and can they sleep without being
dragged around? Thanks for any comments or answers.