I have the opposite problem, Fluval Flex 32 gal set up before xmas. Have tap water at 6.0 ph. Have put crushed coral in the filter and am at 6.4 now, only added 10 Neon Tetra and 6 Cardinal Tetra with 3 Borneo/hillstream loach. Am doing a water change about 25% every 2 to 3 days. All seem to be ok so far, planted tank and snails reproducing and small amount of hair algae so far. Will let it run for a few weeks more before adding anything else.
Was thinking to add a pair of Angels if I can and about 6 albino cory cats, does that sound ok?
Having just thought about this I will substitute the Angels for Gourami or Platies.