Lots of great suggestions so far, here are some of my favorite minis I've grown:
Cattleya (Sophronitis) cernua
Cattleya (Laelia) kettieana
Cattleya (Laelia) milleri--not as tiny as some in this group but well worth the space
Cattleya (Laelia) sincorana
Isabelia virginalis
Isabelia (Sophronitella) violacea
Isabelia (Neolauchea) pulchella--this can grow into a large specimen over time
Dinema (Encyclia) polybulbon--ditto on getting big
Meiracyllium trinasutum
Comparettia macroplectron
Tolumnia guianensis--spikes get very long but growths clump nicely
Ornithidium (Maxillaria) sophronitis
Christensonella (Maxillaria) madida
Ornithocephalus inflexus
Trichosalpinx chamaelepanthes
Restrepia striata
Dendrobium (Epigeneium) nakaharae
Dendrobium lamyaiae
Dendrobium jenkinsii
Dendrobium bellatulum
Bulbophyllum hirundinis
Bulbophyllum pecten-veneris
Bulbophyllum gracillimum
Bulbophyllum vaginatum--kind of a rambler
and a bunch more I forget right now...
Not all of these will like growing in a tank, but most can thrive in a bright, airy windowsill setting, or outdoors much of the year in my climate zone. Sorry to hear about your setback ,but I hope you have fun rebuilding your collection!