David Collins, the one that
wrote this little article is from France. He has been writing about the Anoxic
Filtration system for many years now on Koi Forums to let everybody know just
how good the Anoxic Filtration System really is. How big are his fish you may
ask: 25-32"(63- 76 centimeters) long. Not only that but his pond is very overcrowded,
too.
I converted my 45,000lts
(11887.75 US gallons) Koi pond to an Anoxic filter on 6th June 2011 and have
had no problems. I have only cleaned it twice, the first time after 556 days
because there was mulm on top of the baskets and the last time was 4th October
2013 to start with a clean filter when I fitted a rotating drum cleaner.
And so onto today.
I decided that as some of
the Koi were looking a bit full of eggs, I’d encourage them to release them - so
popped the brushes in. Woke up the next morning to what can only be described
as a hell of a mess. Fortunately after 4 or 5 hours of egg laying there
followed 8 hours of egg eating. This pattern continued for 6 days. On the
positive side it meant no food for 6 days but left my good water trashed……..
My Ammonia (NH3) was up from
0.32mg/L to 1.64mg/L. Not dangerous at 23°C (73.4°) and 6.8 pH but not to my
liking. Nitrite on the other hand was up from 0.17mg/L to 1.03mg/L. So to panic
or not? Dr. Roddy Conrad of USA fame says don’t panic so that’s what I did, no
salt and no water changes.
What I did do was continue
the ‘do not feed’ feeding regime and conduct some daily monitoring with the
Hanna HI83203. From the first day the parameters started to fall, the NH3 by
20% per day and the NO2 by 25% per day. Five days later I’m back to feeding
500grms of 44% protein food with NH3 at 0.4 mg/L & NO2 at 0.18mg/L.
Conclusion? The Anoxic
filter system is without a doubt the best filter in the world. Everybody should
have one.
The photo will give you some idea on just how murky the
pond water will become after a spawning. Photo taken from internet archives.
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