The red gene is the recessive gene, I think it works that crsXcbs=cbs and regular brown coloured young with the offspring all carrying the recessive red gene and there young comingout a percentage of red due to there being 2 lots of the recessive gene being present Breederd cross cbs and crs (outbreeding) to improve the crs grading the re-inbreed the red colouration to fix it. Not all sulawesi species are small, Harlaquin (caridina cf. spongicola) are 1cm or smaller but cardinal shrimp and goldflake shrimp are similar in size to adult female cherry shrimp with some reports of adult amano sized ones. THe latter 2 are the easier 2 species to keep with spongicola being near on impossible. As mentoined, they need soft water (3-8dgh) with a ph of 7.8-7.4 and a temperature of at least 28 is recomende for the sensative species and 26 for the less sensative ones. They crop up occasionally, spongicola - £3.50 i think they where but most would die VERY fast. cardinal and goldflake vary from £12-£22 in the uk.