Beastije
Fish Addict
I really can't advice without water parameters. I can only say that even in 360l i had the only viable Tanganika surface fish was not thriving cause it was too small for it (i had cyprichromis leptosoma for 2 years or so). I then stopped caring about ph adjustment for my shell dwellers, let it drop to 7.4 or so and then went with daniels first for few years and then harlequin rasbora for 4 others. Never had agresivity issues with any of the surface fish towards bottom fish nor the other way. Though the rasboras are too cheeky and go to the bottom which only stresses the shellies. Any true surface fish like hatchet or nannostoma won't tolerate the hardness or the ph.
I read about Oryzias latipes which could theoretically fit parameters but i have zero research or experience
I read about Oryzias latipes which could theoretically fit parameters but i have zero research or experience