vampyrebat78

i have an established tank,
we introduced 2 new fish 3 weeks ago and last week they died, the rest seemed fine but this morning i found my pleco dead, he had been in the tank since the beginning.
What should i do for my other 5 fish,
Should i clean the tank right out?
Can't find any info on what i should do.
HELP MY FISH.

purple_phoenix

Sorry to hear about your fish

I wouldn't clean it out completely. Test the water (ammonia, nitrate, nitrite, etc. also temp.), and do a good water change if you need to. Make sure you take your pleco out, too.

The more we know, the more likely we'll be able to help, so...
Were there not any signs of disease in your tank?
Which new fish did you add, and which ones did you already have?
How big is it?

COBettaCouple

do you have a testing kit? if not, i'd recommend the API master freshwater testing kit.. you'll want to get the ammonia, nitrites and nitrates readings along with water temp. how long has the tank been running? what do you treat your tap water with?

welcome to fishlore and hope we can help out.