Fish Dying

[Miller2009]

I got some platies at the weekend and one by one they all seem to be dying. I've checked the water quality and everything is good. The funny thing is that all my other fish are fine

I feed them earlier did a quick count (as you do) and one of them was just hiding under some leaves not interested at all as the same as the other ones. Ideas people?

 

[the_lock_man]

When you say "good", what do you class as "good"?
 
What other fish do you have? What size tank are they in? How did you acclimatise them?

 

[Miller2009]

Ph 6.8
Ammonia 0
Nitrite 0
Nitrate <20

6 black skirt tetra
5 neon tetra
2 blind cave tetra
1 Bol ram
1 angelfish
3 Cory
2 pearl gourami
1 guppy now 3 platy

It's 165l 84x44x46cm

 

[snazy]

How did you acclimatise them?
 

 

[Miller2009]

As I have with all my fish left them in the bag for 15/20 mins to acclimatise to the different water temp added a small amount of tank water left it a little longer added a little more more water tgen left for 10 more mins then netted them and placed them in the tank left the lights off for a couple of hours. It's the same I did with all my other fish and they ok.