flamenco-t;1588677; said:
If there is such thing...
I am guessing parasites ? the fei feng started to grow fungus.
I have treat them with salt, WC, Prazi Pro, Melafix and Pimafix to combat secondary infection.
Without pics and water parameters, anything any of us could say is but a guess. However, your sig lists one 240g tank with an already healthy stocking level of fish. And the dosing of several meds in a desperate attempt to mitigate further losses tells us a few things.
Were these new fish added into 1 tank, or several? Did they exhibit any signs of stress (rapid respiration, shimmying, hiding in corners or staying in current) prior to their demise? Was their shipping complicated by delay or ill weather? What was the ph/ammonia of their shipping water, and were the fish drip-acclimated or simply floated? Are you certain that the sudden losses were not due to aggression from tankmates?
Both black aros and the atabapo pikes (whichever type they were - Atabapo Fires or the strigata type atabapo) prosper best in black water - low pH, low hardness, low bacterial loads. It is not all that unusual for them to fare poorly in new tanks, or in tanks with heavy loads (re: your 240).
You mention your fei feng had "fungus". Fungal infections are NOT related to parasites, but are opportunistic infections of damaged/exposed tissue, and are easy to diagnose by the presence of cottony growths. These growths are not slimy or gray but white and well, look like cotton! If the growths were gray and slimy, it was a bacterial infection (again, the presence of which does not necessarily mean there were parasites, and can thrive quite well without any help). Such infection could be due to physical stresses like pH burn, ammonia burn, physical damage from other fish, etc.
Treating with multiple remedies/medications is unwarranted and, frankly, BAD. Prazi-pro is most useful as a wormer (being Praziquantel) and being infected with worms generally does not = quick death. There are precious few parasite infections that will kill selectively and rapidly, and even those are easy to spot.
In the end, any advice given cannot replace your fish. You are on the right path with the salt and water changes. The other 3 treatments are probably not going to help your fish, and can only degrade your water quality further.
