Originally Posted by
ganesan
Very interesting points. I guess some fish which are not discus like tetras plecos etc could have stronger immunity and may look healthy when in fact they may have some infection which we fail to notice. Like you say I think.its best to clean the whole tank with bleach and start again from scratch with all new sponge filters or bleach cleaned sponge filters, new airline tubes and new aerator stones and new python suction tube. I am sure bleach would kill all germs. Is it necessary to fill the tank with water add bleach and leave for a few days or just few hours and wash would suffice.