What's the name of your Vanda?
You should be able to grow and bloom them at your latitude, but as mentioned before they need some warmth, food, and lots of light. Unles you have some high powered lights in that tank it would likely do better on a windowsill.
Vandas also appreciate good air flow around the roots, which is why most are grown bareroot, or in some cases potted in a very coarse substrate. Seeing how happy that begonia looks, I'm going to guess that the substrate is fairly fine and water retentive.
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