Hello and thanks for the remarks,
I still haven't got the quote thing down yet, so I'll do it the old fashioned way.
The trace supplements I was talking about are simply used to get the required minerals back in the water for the fishes physiological functions as well as buffer reverse osmosis water. If you are already dealing with very soft, neutral or slightly acidic tap water, you may be able to get around the r.o. issue. I, on the other hand, have tap water with a pH of 8.5 and a TDS over 500 ppm. There is no real choice. Kent Marine is the manufacturer I have stuck with for the past 8 years. Sorry, but I don't know of any others. I tend to stick with what works for me.
If you cannot find a similar product, you can use dechlorinated tap water to get the same specifications, but may have to tinker with the pH a little more.
Likewise, the vitamin supplement is also a Kent product. I usually just use it when feeding frozen foods since I don't believe that there is a constant need for it. With that said, I have found that fry which have their food, frozen or otherwise, dosed with the product have gotten slightly faster growth rates. Zebras do exceptionally well on it.
Kent has a website at kentmarine.com
They may be able to direct you to someone who sells in that part of the world.
On a side note I would like to say something if the forum can bear with me. It's been nearly six years since I first sat down and started reviewing my journals to get that book together. At that time, there was very little information available and it was nearly impossible to replicate the few published instances of spawning these fish. I was lucky enough to have been able to reproduce my results repetitively, and know why. I would first like to thank those members of the forum who first inspired me to take the project underway in the old catfish-l mailing list. I would then like to extend a special thanks for all the individuals who have told me how much of a difference I was able to make in their tanks. I especially get a kick out of the ones, there have been several, who have called me a
PLECO GOD.
I don't think anyone knows how it make me feel to know that my work has been appreciated at that level.
Thank you all,
Larry Vires
Impossible only means that somebody hasn't done it correctly yet.
{By the way I bought what I am assured is a real copy of your book!} and then I was told that you were indeed still alive, just not online. No further information was obtainable as to what you were doing or what area of study you had moved into. I was thinking the worst, that you had left us. 
)