I should hopefully be getting a tank soon that is 2 foot cube (ish, a little taller than long). into this tank will go my macro breeding group, female honey gourami and platinum tetras. im looking for something cardinal size but cant drop the ph due to the macros needing hard water to breed. ph varies between 7-8 and the gh is in the region of 14-16 i want something that shoals really tightly, but grows to a similar adult size as cardinals or harlaquoin rasboras. any ideas?