Thank you for your compliments. Just, you didn't hear my accent... oh

Would you then get a good idea what I am talking about ?

So, if annyone correct my posts I would be happy to have oppurtunity to learn not just from movies
I think I've found the annswer at my problem, but unfortunetly (I know there must be one letter twice, but I just can't figured is it na "n", or an "t"

), the outcome is to let all guppies drop dead. This is some part of the text:
"... the mortality rate increased, and it became clear that they were carrying an infectious agent which would spread to domestic produced guppies with lethal consequences. Exposure of healthy domestic produced guppies to Singapore fancy guppies resulted in near total mortality within a few days. No treatments seemed to be effective, and the problem continued to get worse with the imported guppies. It became impossible for a wholesaler or retailer to carry Asian guppies in the same system with domestic produced guppies without the domestic guppies becoming infected and experiencing almost total mortality (the Asian guppies had high but not total mortality and appeared to have some resistance to the unknown agent)...
...Once when the disease was in full bloom, I took one drop of water from a diseased tank and put it in a healthy 5 gallon tank of fish. Within 24 hours fish in this tank were dying; strong stuff..."