I think you might be ok with at least a 90 litre long tank, but obviously the bigger the better. (36 x 12 x 12 inches or 80 x 30 x 30 cm approx) higher depth tanks will be absolutely fine also, those figures are minimum tank size i would suggest.
If you see the links I posted for Bronze Cory and Harlequins from Seriously Fish, that suggests a tank of at least 80 cm long and 30 cm wide, so using that you are looking for a tank thats about 3 ft long, that would work nicely for a group of 6 Bronze Cories, same thing for the Harlequins although that says 60cm long, but a larger tank is always better.
depending on your budget, have a look online and am sure there will be a few second hand 3ft tanks for sale at good prices, you can also find some new full set ups from LFS at fairly reasonable prices (those sometimes comes with not so good heaters and filters, so check these out first before buying!)
Happy shopping and let us know how you get on and do ask if you ever unsure or get stuck with anything at all.
If you see the links I posted for Bronze Cory and Harlequins from Seriously Fish, that suggests a tank of at least 80 cm long and 30 cm wide, so using that you are looking for a tank thats about 3 ft long, that would work nicely for a group of 6 Bronze Cories, same thing for the Harlequins although that says 60cm long, but a larger tank is always better.
depending on your budget, have a look online and am sure there will be a few second hand 3ft tanks for sale at good prices, you can also find some new full set ups from LFS at fairly reasonable prices (those sometimes comes with not so good heaters and filters, so check these out first before buying!)
Happy shopping and let us know how you get on and do ask if you ever unsure or get stuck with anything at all.
