An other poorly platy

[Tycho]

I've got an other poorly platy, this one has what can only be described as having a whole in her head.

The tank that she is in is over stocked at the moment but I've been testing the water every 2nd water change... so fortnightly and everything comes back fine.

Any ideas what it could be and should I be concerned about the other fish?

[Martinspuddle]

How overstocked, what are your test reads, how often are you doing waterchanges?

[Tycho]

Its hard to say how over stocked it is as its mainly fry with a couple of exceptions however some of the fry have reach a size accepted by the lfs so was going to take them down at the weekend.

I do a 25 to 30% water change every week and I did a water test not last week but wee before and everything was 0. I do my water changes on a Thursday so I'll do an other test tonight before I change the water.

[Martinspuddle]

Any ideas what it could be and should I be concerned about the other fish?

The picture is not great clarity, so it's a little difficult to see what is wrong with this fish. Is there any other inmates looking unwell?
Doesn't look much wrong with those Lamb Chop Rasboras to me.
How long have you had that Platy?

[Gingerlove05]

I agree i cant see anything that would point to something wrong. As Martin has said how long have you had them? And what temp are you running at?

[plankton]

Temp and hardness could be important to understand what might be going on.....

[Tycho]

When I got home last night and only the light built into the filter was on, will try to get a better picture when I get back from work, its one of my old fry that I ended up keeping as she kept hiding when I was taking them down the lfs, I think she is around 9 months old.

Hardness is quite hard... severn trent say 10.5 however measured it at 13 a few weeks ago when I bought a kit. I typically run the tank a little warm at 25 sometimes climbs a little higher

[Tycho]

The heater isn't the greatest as can't set the temp so might be time for an upgrade

[Martinspuddle]

When I got home last night and only the light built into the filter was on, will try to get a better picture when I get back from work, its one of my old fry that I ended up keeping as she kept hiding when I was taking them down the lfs, I think she is around 9 months old.

Was she fully grown when you purchased her, she maybe older than you think.

Hardness is quite hard... severn trent say 10.5 however measured it at 13 a few weeks ago when I bought a kit.

Mines 17 and anyway Platys like it hard.

The heater isn't the greatest as can't set the temp so might be time for an upgrade

Is your central heating on, it will have some baring on your aquariums temperature.

[Gingerlove05]

25C is a bit warm for them, i kept mine around 23C. But at 9 months old shes not that old.