Hollymolly4
Fish Fanatic
Here's my plan. I have a 28 gallon bowfront and I want to put 6 Tiger Barbs and 3-4 Polkadot Loaches in. Will this work? The tank is a year and a half old and planted. I already have one polkadot loach.
I'd consider some quieter Barb species (or another dither, like Danio's or Rasbora's). Tigers are on the aggressive end and are likely to irritate loaches. I keep Odessa Barbs, these are smaller and more peaceful than Tigers, and they undoubtedly irritate loaches...Tigers would have been worse.
Also, 28g is not that large and you need to fit in decent shoals of loaches and dither; going with smaller dither will allow to have a larger shoal of them.
(you want 5+ loaches, this is the standard minimal shoal size for peaceful Botia's, and a larger shoal is even better; Kubs grow very slowly but are likely to reach 3" in time, you can do the gallon/inch math and see that you don't have all that much left for a dither shoal unless you go with slightly smaller species, and there are a plenty of them to chose from.)
(I keep my Kub shoal -- 13 of them -- with 6 Giant Danios. I'm not suggesting this specifically, but it works very nicely, and in tank the size of yours, I'd have used some smaller Danio species or Rasboras.)