Loosing Fish

[basil1]

Hi, my new tank all cycled ( fishless) all readings fine, live plants been in for months, introduced fish 2 weeks ago 2 guppies molly platy all sociable, but 2 days ago lost female guppie, this morning found platy dead，what's happening

 

[Flagtail]

Hello and welcome to the site.

 

[ZoddyZod]

Hello,

So if I am reading this right, you performed a fishless cycle months ago but only added your first fish two weeks ago?

What was the time between finishing the cycle and adding the first fish? If there was a long enough gap it could be that the bacteria died off due to lack of food.

Did you test the tank straight after the fish died? What were the readings?

 

[Carlovel1]

Hi and welcome to the forum.
Basically, you need to check your water stats to check there isnt a harmful level of ammonia or nitrates...