Sa-nook appear to be an orchid seller in The Netherlands. Not sure if this orchid is actually registered as D. Sa-nook or if they just use that name for all their dens. It appears it may be a copyrighted name which does not always match with RHS registered name.
From their website
Sa-nook is Dendrobium | sa-nook.nl they appear to sell Dendrobium Phalanthe types (hybrids of Dendrobium biggibum and/or similar dendrobiums, look for care info for Den phalaenopsis, or Den biggibum)
I would't water these as often as 2-3 times a week in the UK, maybe in hotter countries but not in the UK. With mine potted in bark I water about once a week, but check it before watering and if it still seems to damp I might skip a week (or if I remember come back to check it again later in the week).
I find they like their roots to not dry out too much, a little is fine and they don't want to be kept too wet. I tend to grow them a little drier than I probably should, letting them dry between waterings, but try not to let them be dry for long.
Mine like a west to south-west window behind a sheer curtain. I have grown them in full sun before in the summer on the same wall (just outside the window I have them in now). If adapted to that slowly some of them did great with that, but others showed early signs of burning so I moved those in again. I grow them brighter than Phals (which are in east facing windows at home).
They like similar temps to Phals, that is temps that are comfortable for people, so make great house plants. Some other types of Dens I grow cool in the winter, but not these, these stay in the house in the winter.
What is D. 'sa-nook' ('sanook')?
though even that is just a trade name (not registered with RHS).
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