Hi,
thid is Heiko Bleher and if I have understood correctly the Neons were freshly imported and you placed them into the community tank? If that is/was the case, then it is only very normal that thiose fishes began to die like flies.
Yes, they were put into a 75g with hatchets and otocinclus which were in the same order. I didn't plan on these fish or I would have done it differently.
A stressed, freshly imported fish, should NEVER be placed in a community tank, ONLy into a separate quarantaine tank where there is no other fish. And stay there under observation for at least 14, better 21 days. In a separate tank they do not have to fight the bacterias and parasites the other fishes in your community tank have and live with very well. The "newcombers" have no resistance against those (they need to first grow onto them, in your water, which in any case is always different from the water they originally come from).
Typically I seperate for 30 days. Do you have any sort of regular import regime you suggest? I usually go with monitor and treat if I see specific symptoms.
I start out feeding live teh first two days, then transition to trying prepared foods.
No medication or treatment whatsoever will help now (nor before), and only the strongest of all of those will survive eventually. Only those which have a very strong immun system and can resist.
Please remember this once and for all times. NEVER place new fishes to your old(er) fishes, have new ones ALWAYS quarantained separately and you will never have this problem again (unless you get them sick and for that watch always you source).
I did not place them with fish I had been keeping, only with new arrivals. I received a call from my transhipper that 8000 fish were displaced and would I tak ea portion. Any help you can offer on what to do would be sooooo appreciated.
From one who works with fishe over a half a century...
Heiko Bleher
www.aquapress-bleher.com