This threads pretty old OP may not even have them any more. Catlocarpio siamensis are not Mahseers. They don't come from clear fast flowing water of the Himalaya. They come from the Mekong river and can be found in ponds swamps and canals. There not that sensitive to water conditions in the sense they are not that hard to keep. At least for me there not I do nothing special.. Define bad water. Polluted? most fish would die in polluted water. I got 4 of them around 4" size about 2 years ago. There around 9-14" now.