my fantail goldfish have fungus type lumps

[kendra20]

Hi my fantail goldfish keep getting fungus type lumps on their heads I have treated the water with a special liquid from the pet shop that clears it up for a while then it comes back. how can I get rid of it. there are 7 fish in a 2ftx2ft tank with 2 filters. the tank is clean and they are cleaned every week. it dosnt seem to bother the fish but I want to geet rid of it. any suggestions what i can use safely. I dont want them dying on me. the other fish in another tank are fine, it only affects the fantails.

[B00]

Crikey, thats an overstocked tank isn't it?

[kendra20]

do you think so? I was wondering if that was it. they were only tiny 3yrs ago and of course they have grown quite a bit. do i need to put some in another tank. thanks for your help

[B00]

I don't know what the problem is to be honest, it more than likely isn't related, but you really do seem to have over populated the tank which won't help matters.

[divegirl]

There are lots of things it could be....try googling Fungus on fish fro images as that will give you a better chance of identifying what it is.
I'm not going to even go there with how over-stocked your tank is.