Basically they are very hardy with exception of the pink, red and blue and maybe some other insane color.. These 3 colors are very demanding and not easy to handle.. They are sensitive to light changes, water patameter and temp... Tried all 3, melted eventually.. Pink and red like high light, but you have to take into consideration of the light in the lfs and yours... It is always better to let the yumas get used to the lighting and not blast it directly with all your light.. put it under shade den slowly move it out over the week.. works well for me.. For blue yumas, it is more sensitive to temp if not wrong, becos mine only lasted me a few months.. my temp was 28.. Haven seen a true blue yumas again to try.. The weird multicolor are difficult tovkeep too but only kept a few before, they have different preference..