I don't know what's wrong

[Claudia]

I have been dealing with tail rotting..not getting better but is not getting worst. 2 of my guppies died in about 2 days. I don't know what it can be, they seem normal, no tail rotting or anything visible and one of them was pregnant too... just starting to show. The only thing i didn't do was change of water this past weekend, i do it every week but this weekend i was helping my mother in law move :( Can that be what kill my guppies?

[Melody]

Usually tail rot has something to do with the water conditions. Do you vacuum the gravel well at each waterchange? Keep the filters clean? I'm assuming the tank is established as I think you posted before that it is, but you could still be having a mini-cycle.

Water changes won't kill them as long as you're using dechlorinator and water of a similar temperature.

How long have you had the Guppies? Tail rot can also be the result of an internal infection, which they may have been brewing when you bought them. They're prone to disease.

What else is in the tank? Are the other fish ok or are the Guppies alone?

You can try aquarium salt and melafix, but its important that we determine the cause.

Sorry to hear that you've been struggling with them. Hopefully we'll figure it out soon.