petshop johnny said:
You should always have a 5 gallon hospital tank .when using fish meds .no gravel just a hiding space and an airstone sponge filter and aheater also note that temperture greatly affects meds always raise the temperture to a about 80°F or above.fin rot is very difficult .i have a book that recommends removing the fish quickly as possible and swabbing iodine unto his rotting fins,never tried it.its usually a water quality problem.
I agree a hospital tank is the ideal thing to have.
But what do you do when you have a heavily planted tank with many hiding places, catching one fish could result in you ripping all your plants out, and the risk they may never recover and die, also you have the added stress of removing a fish from its shoal mates and isolating it on its own.
Not every one has the space or the funds to keep a hospital tank set up on the chance that a fish may need treatment, OK I know strictly speaking you should have a hospital tank that can be used for quarentining all new purchases, but how many people can do that.
I believe problems like fungus are always present in your tank no matter how good your water quality, all it takes for an outbreak is for one fish to become weak through injury or what ever and you have an out break of a disease.
The point is these treatments you buy should be safe to use in any fish tank if you follow the instructions to the letter, and if they're not then they shouldn't be on sale.
In my case 3 Platys for no reason suddenly developed fungus patchs on there fins and backs, I did a 25% water change, removed the carbon from the filter and dosed the tank at the stated rate, I know to the litre what my tanks capacity is because I noted how much it took to fill it with all the rocks etc in, many people assume there tanks hold more and don't account for water displacement from rocks.
3 days later 3 tiger barbs and 1 rummy nose died over night and the rest of the fish were stressed and gasping at the surface, I changed 30% of the water and thankfully the fish recovered, I shall do 10% water changes daily over the next week and never use that mediacation again.
Robert