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80l is about equal to 20g- you cannot keep the clowns in there. they will need at least 280l/70g, they get a foot long. the yoyo loach and clown loaches need 4+ species schools anyway, so they won't be able to stay. the tetras will need a 6+ school to make them less stressed and more active. the clown loach is swimming with the pictus because it is distressed from having no school. heres an idea:

give away loaches/put them in a 280l with 3+ species friends each

80l should have:

6 tetras

pictus

4 otos (good algae eaters)

6 zebra danios

live plants (healthy for tank, otos like them)

possibly a guppy/platy or two