the sick just like 'hole of the head' disease!!!
is it the hole in the head??
just add the 甲硝磋(very cheap, $4or $8 or 100 tablets!!)
add 5 tablets in the tank(my tank is 90cm, 30 cm, 30cm long!)everyday or learn this link bleow(i also learnt from that)!!
http://www.lanshou.net/read.php?tid=1991&fpage=3&toread=&page=3P.s. when adding the medicine, no light please!! i add the medicine in the night!!
let medicine kill the germs(21:00hrs to 6:00hrs!!)
also add the medicine as soon as possible!!
this sick kill the fish very quickly!!