cycled tank but still having problems?

[moggsta]

right so as mentioned in some of my earlier threads i have lost a few fish in the first month since my tank has been cycled...

4 swordtails in the first 2weeks..now after adding 4 platys one died this morning and one is on the way out :(

i have noticed it has like a fluffy white film on its fins and a lil white spot on its eye?

what i am confused about is 2 of my swordtails i first brought are doing fine??
the fish that died was fine yesterday?

[wijnands]

If you get poor quality fish their immune system isn't upto scratch. What you describe sounds like fungus, that will hurt the poorer fish and can eventually kill.

[Cermet]

Over feeding and not getting all the food out of the substarte (esp. gravel) can be a hot bed for fungus and cause the fish issues. There are fungus treatments but good tank cleaning and going easy on food will go a long way (not that that is the issue but this is something to consider.)

[imma24]

In addition, it is also really important to check new fish carefully in the store before purchasing - sometimes you might notice other fish (that you aren't interested in) with funny stuff on them - red flag to avoid all the fish in that tank.

[moggsta]

right so i have woken up and found all the platys dead!! :( now only leaving me with 2 swordtails which i had from the beginning...im just annoyed how now i have gone through the whole fishless cycle process to lose 8 fish now in a month!! it is not pleasant and makes me wonder why i am doing this! i have done a 50% water change...i am now wandering what am i to do next !! :(

[Cliff]

Have you checked your water parameters lately ?

Could something be off ?

[moggsta]

ammonia 0.00
nitrite 0.00
nitrate 10

ph 7.2

all have been like this apart from my wild ph swing after i cycled first off

[imma24]

They were all swimming normally, eating normally? They all looked healthy when you brought them home?

You might have mentioned this before but what size is your tank?

[moggsta]

they were all fine when i brought them, some hid when i came into the room but that is normal right? my tank is 90litre (26gal)

[imma24]

How long had you owned them before they started dying?