Lost rummy nose tetras

[Nick L]

So we are looking for some advice. We got a batch of fish from our local store a few days ago. We got 3 panda corys, a bristlenose pleco, 4 mollies, and 6 rummy nose tetras. We used an open 55 gal tank to quarentine and a cycled sponge filter from another tank. We treated with copper safe, ick ex, Melafix, copper safe, maracyn oxy, and aquarium salt as the lables said to. The first 48hrs things were fine but ick ex calls for a 2nd dose after 48 hours 12 hours after the 2nd dose the rummy nose started dying off so we threw the ones that were left into an unmedicated tank and we've lost all but one so far does anyone know if it sounds like we did something wrong or if maybe it was a weak batch of fish? Everything else is still in the medicated tank and we have started carbon filtration on it to slowly remove meds but everything else seems to be doing fine. Does anyone have any advice or input on what happened?

[Colu]

That a lot of meds to use at once my suspicion would be a reaction to the meds some species are more sensitive and you might have got a weak group of tetras and using the meds has put them over the edge

Edited March 31, 2021 by Colu

[Nick L]

Thats kind of what we were thinking its unfortunate but it happens. Moving forward wed like to have more rummy nose. But if we need to change our meds or something wed like to know before we get and potentially loose more

[Colu]

The med trio has been proven safe maracyn ick x and paracleanse

[Mmiller2001]