Julie <><
>
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*******
> To Bruce Hansen's comments:
>
> Ammonia & nitrites zero after disaster. Chlorine
> untested but presumably zero coz treated with Prime
> and quite a few hours after the refill.
>
> CO2 is only coming on very infrequently as pH slowly
> rises. Will run a Dupla test on the exact value this
> evening. (But doubt it - unless it had a big pulse
> during the night - but manometer pressure readings on
> the Dupla gauge have not changed - bottle replaced a
> few days ago).
> A big Running Creek Trifasciata that was on last legs
> - threw it in the goldfish tank which is salted and
> heaps of aeration and it's gonna make it. Goldfish
> seem uninterested in their visitor.
> Mortality has now stopped - sort of started to improve
> after the lights came on ... and yes I fixed the
> air-pump late afternoon (and bought a cheap spare)
>
> On Diatom filter - motor, filter bag, and glass bowl
> were all dry and clean. Hoses had a small amount of
> residual odour (not excessive) that was a little rank
> from sitting with water inside - but they were well
> lushed totally with a garden hose before use.
>
>
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*****
>
> To Jennifer:
>
> Odour wasn't H2S gas. Sort of slightly decay strange
> odour - but I couldn't pin down a source - tank smell
> seemed OK. As above Diatom filter was dry except for
> hoses that were flushed.
>
> Tank filters were not turned off during the change -
> they were kept working. No power blackouts or anything
> (I know as my beside clock-radio time would have been
> flashing !!)
>
>
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******
>
> To Chuck Gadd:
>
> Tank is open on top - no cover glasses. Ceiling fan
> would have been on in the room to move air around.
> I actually swapped to the Rio 1700 powerhead after
> finding my Dupla S reactor (being forced by a
> restriction in the filter outlet) kept slowing (small
> debris buildup). I drilled a hose in the bottom of the
> powerhead and let the rotor "smash" the CO2 into a
> zillion little microbubbles. They drift along the
> entire 6 foot glass front and seem to slowly dissolve
> as they rise. Not perfect I know. IMHO it seems to
> keep the pH more stable, my gas supply lasts twice as
> long, and a generally "better" result. Although yes
> seems heresy from established teachings. pH is fairly
> stable during the day although drops 0.2-0.3 during
> nights due to high plant growth in the tank. Also
> surface of the tank is disturbed by the two Otto
> outlets and Fluval spay-bar. pH 6.8-6.9. ANyway this
> had been setup this way for
> many months now with no probs.
>
>
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**********
> To Matthew:
>
> Bodies in dry plastic bag in the freezer but maybe on
> the way to yukky fish soup through decay processes.
> i.e. I probably didn't get them quick enough. Also
> what would I look for upon dissection ?
>
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*********
>
> I guess my options are still:
>
> Pathogen - but seems too quick and selective of big
> fish
>
> Chemical toxin: - chlorine ? - but Prime treated - but
> what else (no pesticides in use)
>
> Bacterial explosion (the Pseudomonas suggestion)
>
> Or maybe a combination of 200 litres of new
> unoxygenated water, close to lights-out (night
> respiration load), plus an airpump failure.
>
> Trouble is that no option seems to be totally
> consistent with the outcome.
>
> Would one think that something microbiological could
> have "brewed" up in water change drum. 200 litre black
> poly food grade ... had used the water for Discus tank
> two days before .... tank is in semi-shade... Rio 2100
> turns it over to mix Prime etc.... but not on all the time.
>
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