Ted, growing 40+ years, asked why not grow all epiphytes in open baskets like Vandas—less rot, no medium breakdown. Expert: different groups respond differently. Dendrobiums need dry dormancy—possible in baskets but requires rest period. Stanhopeas have finer roots, less water storage—may need more moisture. Large-rooted types (Vandas, large Cattleyas) suit open culture due to water storage in roots/pseudobulbs. Consider ease of moving overgrown plants without root damage. RO water lacks minerals—must supplement.