i see !
so i introduce mytank !
now, i rear Neontetra,apistogramma_bitaeniata,trigonostigma,and so on
in japan,we frequently use very little tank !
we rear little fishes&shrinps.Beeshrinp,borarasbrigittae...
and rear waterplants,like riccia,taxiphyllumbarbieri,microsorium
bind round wood ,stone,,,
they say it "miniriums"!
of course,someone use verylarge ,but,i think, rather rarecase.