On Tue, 6 Apr 2004 11:09:42 +1000, "Graham Broadbridge"
wrote:

I've had very little success with denitrification filters. About 10 years
ago I tried a sera denitrator and that failed dismally - although that may
have been because I didn't understand the process and my flow rate was probably
too high.

Recently I tried a home brew filter using around 50 metres of tubing, but I
couldn't get the flow rate correct to maintain an anaerobic culture. It just
clogged up.

Best bet to reduce nitrate levels are lots of adequately fertilised plants
and water changes.

Even that has it's challenges :-)

I have been thinking about a better system to reduce Nitrate levels,
when I doubt that anything can work better than a pre-filter.

What I mean is that waste material could be collected and separated
before it could go through the Ammonia to Nitrite to Nitrate cycle.

Hence collect the fish poo and other waste, then it won't break down
into the end product of Nitrate.

Now I am wondering how it is possible to do that beyond very good
filtration and manual cleaning. I guess having easier cleaning would
be a start.

Ideas?

Cardman
http://www.cardman.com
http://www.cardman.co.uk