Fish dying off

  • We are currently upgrading MFK. thanks! -neo
any antiseptic needs to be well rinsed, pure chlorine bleach, make sure no detergents , long as rinsed good will be fine. any small amounts that may remain prime will take care.
 
I've removed the remaining fish, emptied 95% of the water, cleaned out all of the filters and I am now filling the tank back up and will try adding a new fish tomorrow. The old fish have all been moved to a 55 gal, there were only 4 rosy tetras and the 3 young black acara left. If I still keep losing fish and the only option is to throw all decor out and sterilise the tank and filters I will probably just sell up and take time out. Thanks for the replies :)
 
Most recent additions were the rosy tetras, 6 of the 10 died off. The only fish that seem to be unaffected are the 3 young black acara.
 
Given that you emptied 95% of water, and cleaned the filters; it would have been advisable to go full hog and bleach it, might sound pedantic but 5% water is more than enough for bacteria and diseases to remain active in; in fact i'd go so far as to say that that tank will still very much be at risk if it is that disease pops mentioned.
 
It may be obvious, but...

If you use 100% chlorine bleach, do not use vinegar. One or the other, not both. Together they create chlorine gas.

For disinfecting however, bleach trumps vinegar handily, so use that.

And if you do use bleach, run it through everything, dipping in the nets, heaters, WC hose etc so you have a thorough disinfection. Use the bleach on buckets as well.

Afterwards you can drain the tank, add water then use a triple dose of dechlorinator. No need to use soap, multiple rinses, or anything else. Just be sure to run the water (with dechlorinator) through the filters and rinse off everything else.

Bleach will NOT naturally dissipate for a very long time (months), but will be neutralized in the presence of a dechlorinator.
 
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