The closest I can come is high light rockpool type biotypes.
I have one that has been below 5ppm nitrate and zero ammonia/nitirite for
over a year now.
That said it has had very very fish fish in there lately.
started as a feeder tank and went on to become a sanctuary for the coolest
bits live rock I could buy.
Myself, I think a big part of having nitrate eaters in your tank is having a
high level of nitrates in you water for a while.
Letting them breed up.
Then when you water change, nitrates may go but the bacteria populations
stay.
Anyway I don't mind water changes, they are a good chance to keep me tanks
looking good.
Unlike planted tank peoples, I like to meddle.
Trick is having enough tanks to spread your meddling out that it doesn't
stress fish.
The solution to pollution is dilution.
remember the mantra.


"Pete" wrote in message
...
Take a look at
http://www.barrreport.com/forums/

There, Tom Barr discusses low-light, non CO2 tanks where you never do
a water change...... strange but true..

I can't comment myself, as I have a high-light, CO2 flooded tank..
I follow Tom's EI dosing strategy with great success.

Best wishes
Pete