All 3 of those meds are available where you live then- personally i'd recommend the "anti internal bacteria" by Interpet first, followed by the Myxazin (Myxazin is the strongest med) and lastly the Pimafix- pick one med. I'd also treat the tank with some aquarium salt (will make the interpet medication more effective and be beneficial for the black molly) and switch to Stress Coat dechlorinator for a while when doing water changes
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ok so can you basically suggest which way I do it?
sorry I'm a newb
Well if you go for the Interpet stuff, you will need to dose the tank with it 2-3 times over the course of the week- the med comes with good intructions. Dose the tank as well with the aquarium salt when dosing the interpet (aquarium salt will also come with instructions). I would advise doing about 3 medium sized (30%) partial water changes with the Stress Coat dechlorinator over the course of the week (making sure to top up any lost meds). You may need to medicate the fish into the second week, but all in all if all goes right it should take the fish between 1-3 weeks to recover with the medication, salt, Stress Coat & water changes.
I would advise treating the tank as a whole with all the fish in it as Columnaris isn't very infectious (but the bacteria will be present in the water) and the Molly will be less stressed if its not moved to a new tank (and keeping its stress levels to a minimum will help it recover quicker).
Columnaris is often caused by environmental stress or gets into the fish as a secondary infection to wounds etc, for further reading please check out these 2 links on understanding & getting rid of Columnaris
;
http
/www.americanaquariumproducts.com/Columnaris.html
http
/www.cichlid-forum.com/articles/columnaris_disease.php