I have a 65 gallon, 4-foot tank, heavily planted, established for about 4 months, with the following stock: - 11 neon tetras - 10 harlequin rasboras - 6 albino corydoras - 6 otocinclus - 1 dwarf gourami I would like to add cherry barbs - probably 10, but perhaps working up to 20 over time. Half male and female. Would this be OK? If so, should I stick closer to 10? The tank is very peaceful but I want more colour and activity! I have a Fluval 306 external canister plus an Eheim Pickup 2012 internal running. I do 50% water changes every week.