info please

Recently I've been thinking about stocking my 6.6g long tank again, and decided I wanted to try something other than Betta splendens for once. While dwarf puffers, anabantoids, and possibly dwarf rasbora have been considered as possible residents, are there any killifish species that do well in...

Does anyone know anything about these tanks please? Seen a 5x2x2 tank with cabinet for only £600 including lights filter. But cannot find a website for it. Has any member got one and if so how are you getting on with it please?