You can download software here that will help you diagnois you fish's health problem and tell you what to do about it. If you find a dead link, please let me know so that I may remove it.

http://www.thefishsite.com/articles/...n-introduction

http://www.aquaticcommunity.com/tila...c-Diseases.php

http://praise.manoa.hawaii.edu/software.php?download

http://www.prfri.ac.cn/english/page/subjects.htm

http://www2.luresext.edu/aquaculture/tilapia.htm

http://www.americulture.com/Disease.htm