When I take home a blooming phal that is in moss, I don't always repot right away, but I do check to make sure it is OK. I always pull them out of the undrained pots they come in and put them in a pot with drainage. If the roots don't look healthy, I repot. If they do look plump and bright green or white, quite often I remove about half of the moss (they pack them so tight) and stuff some packing peanuts or styrofoam in its place to help with air to the roots. Then as soon as the last flower drops, I repot. For me, a drastic change of media doesn't work--I kill too many roots from the shock of moisture difference. If they were in just moss, I add some moss to my bark mix and plan to repot again into just bark mix within 1 year.

In moss they take MUCH less watering than in bark. When I water plants in bark, I usually mist those in moss if the moss feels *dry*. Ice cubes are just a way to kill them slowwwly and keep you coming back to buy more--you don't get terribly discouraged because you kept it alive for a while so you are willing to buy another orchid and the wholesaler's have a constant supply of customers.

The first 2 pictures could be sunburn. If the phal were my orchid, I would cut the end of the leaf and rub some ground cinnamon on the cut. I would be tempted to cut off the whole leaf from the first picture, but I would check the rest of the plant carefully for rot first. Are the roots ok? What does the crown look like? Give the leaf a gentle tug--if it comes loose, you have bigger problems.

Your colmanara looks like fertilizer burn to me, too. Maybe use less fertilizer in your water--some oncidiums can be really sensitive to too much. I sometimes cut the brown off these, too, just for appearances sake. If you want, just trim the dried part off--it is not necessary to cut into the green.

Oh, and--Look out knick knacks! When the orchids start moving in by groups of three, I think your days on display may be numbered! LOL