Jennifer,
Thanks for reply,
Seachem have replied as below in Gary's section.
What will I do differently - airstone in drum and the actual chlorine/ammonia
neutraliser will be added some hours (not days) before. And will be using
Chlormon.
And avoid late night (no observation) water change behaviour. (Although nothing
seemed apparent about 30 mins later in this case).
Gary Lange,
Thanks very much for that comprehensive reply ...
you raise a few questions which I'll answer:
CO2 bottle was fairly new (installed 48 hours before) .... so not an end of
bottle dump scenario that consumes about 70% of the plant list ....In tank Dupla
pH probe recalibrated recently as I purchased a Pinpoint probe for playing with
some Discus and they weren't quite together (0.2 units out).
Water out of tap (and I guess barrel) is 7.6 - typical Brissy tap water value.
In the tank with CO2 it falls to about 7.1 and then back to 6.9 as CO2 works
away.
I didn't forget the Prime dose - two reasons (1) I thought to myself only about
one dose left - need to buy some more (2) I could easily accept things more
easily (with less typing) if I'd screwed up. Yup have made dumb errors before
..... The issue with the Prime that made me think was based on high summer
ttemperatures and time the water was treated. Like how many days ago. Seachem
have replied that their product stores very well, is temperature resistant, and
don't disassociate back to chlorine or ammonia... so I guess I'll have to take
their word for it.
So you have 200 litres 5mg/l O2 water, high temps ...30C maybe, maybe 1ppm
ammonia in the water (post test inference on new tank and inconclusive due to
Seachem test ambivalence), and mainly large fish affected....
Would O2 not be a scenario for the larger fish but ammonia kill all fish. e.g.
large moonlight gouramis were totally unaffected .... labyrinth fishes I guess.
Indian gouramis the same. Most tetras unaffected.
I guess my analysis all considered is some combination of undesirable
factors..... maybe I will have adapted my behaviour but live on in ignorance of
the truth. Anyway one can only but try !!
Merry and happy fishkeeping to all on the list !.