Getting rid of fungus

[Sofishticated]

Hi, these are the readings for my tank:
Ammonia: 0
Nitrite: 0
Nitrate: a little over 0
My tank is fully cycled
I have a 25L tank and 6 fish which is quite a lot but I'm moving them to a 120L when it cycles. They are not new fish I have had them for quite a while.
I have 2 fake plants and 1 real plant.

So here's the problem:
I have 3 danio and 3 platy, and some of them have cotton wool like fungus on them. I am currently treating it with API medication for fungus, however the week of treatment is almost over and I can't see an improvement. I have also done some big water changes and added a plant into their tank. My sunset platy now has a cloudy eye, I'm presuming it's fungus, and was sitting on the bottom of the tank until I fed it and it started swimming around normally. So basically what I'd like to know is if there's a way to treat them that's faster or more effective? Am I doing everything right? Thank you so much and sorry this is so long!

 

[SeanTrollope]

The easiest way to treat these type of things is to do lots of water changes.

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