Guys I'm with you all in supporting the more frequent water changes notion but i can't really see that helping the fish, what about adding some salt to you tank to try and remove/destroy any infections the fish may have, in the correct ration salt can be of great benefit though it seems to be a controversal debate on here whether its actualyl required. But certainly if your fish are ill then try this, go for a ratio of 1 table spoon per 5 gals of aquarium water, be sure to dilute it into some water first and add the salty water to your tank, dont what ever you do just throw salt straight into your aquarium otherwise you'll just end up with a big salt cloud in your water.
Remember salt doesn't evaporate so dont add more if water levels drop due to evaporation and you need to top up, but do remember to add more if your replacing water for your water changes, but be careful to add the same amount of salt as you took out, you dont want to keep overdosing the salt levels which could be equally damaging to your fish as any illness.
Remember salt doesn't evaporate so dont add more if water levels drop due to evaporation and you need to top up, but do remember to add more if your replacing water for your water changes, but be careful to add the same amount of salt as you took out, you dont want to keep overdosing the salt levels which could be equally damaging to your fish as any illness.