Brassia Rex sakata? Help!

[Rowangreen]

It would be good if you could post some pictures. The blooms going might just be time, and yellowing leaves might just be natural too. Is it all the leaves or just some? Can you see roots and what's happening with them? What is it planted in?

The ice cube thing is just an advertising gimmick and not a good idea. The amount sounds really low for a Brassia too. What you need to do first is check you have it in a pot that can drain well. When you water use room temperature water and let it drain through. It's a good idea to take it to the sink to water. You can use lots of water as long as it can drain away quickly. You want to water when it's nearly dried out, but not totally. How often will depend on what it's potted in and conditions in your home.

It's very possible it has some issues going on with the roots. You might need to repot: again, pictures showing the roots would help people to help you.