2 Problems Please Help

[Matts]

I had the fungus eliminator in it. I since changed the water a few times so I think any medication would be out, also it has been 2-3 days since I added it. Yeah looks like he has lost a bit of weight. He is a very skinny fish now. Thanks for the advice I will try feed him that.

 

[WILDER]

You now need to treat for whitespot.

Losing weight can mean the fish is not being fed enough, the fish isn't eating, bacterial, parasites external, parasites internal, stress, old age.