Stocking help? (74 litre tank)

[RainyDays]

Does anyone have any stocking suggestions for a 74 litre tank?

All I have planned so far is that I would definitely like 4 (male) guppies and 4 corys (peppered corys are currently what I'm thinking). My previous plan was 4 guppies, 3 corys, 6 rummynose tetra, 10 neon tetra, and 1 dwarf gourami, though it has been scraped after reading that there could be problems between the male guppies and a male dwarf gourami, and wanting a different selection of fish.

Would anyone be able to make any suggestions?

 

[Essjay]

Before we can suggest fish, we need to know how hard your water is. The simplest way to find out is to look on your water provider's website. We need both the number and the unit as they could use one of half a dozen different units.

The problem with guppies and cories is that guppies are hard water fish and cories are soft water fish, so one or other would not be happy - and cories need to be in a group of at least 6.

 

[RainyDays]

Ah sorry! Forgot to add those on to my original post.

I tested my water yesterday, these are the levels:
pH - Around 7.4
GH - 300 mg/l
KH - 180 mg/l

Ah that makes sense; I'll probably leave the cories then and go for another bottom dwelling fish (any suggestions?)