Advice Needed Please Re Danios Species And Schooling

I have just started the hobby and a few weeks ago finished fishless cycling a 110 litre tank and now starting to build my stock. I have an external Eheim 2213 filter which gives some good flow and movement. I currently have:

4 zebra danios (building stock to 6)

6 harlequin rasboras

2 glowlight danios (building stock to 6 -I am waiting for more stock to arrive at the LFS, no one seems to have them!)

4 pearl danios (building stock to 5)

I plan to add 2 honey gouramis, 6 neon tetras and a couple of shrimp

Last night I wanted to add to the danio rerio's (zebras) and wanted to get some leopard danios which are the same species but different colouring. The LFS did not have any but suggested I take some gold ring danios which they said was a purer breed and would school fine with the zebras. When I got back and researched it I have found the gold ring danios are danio tinwini.

If I get more gold ring danios it would affect the other stock I wanted to add to the tank. So my question is... will the gold ring school with any other danios? Thanks for your advice.

Thanks Sue. I can't seem to find an LFS who will give sound advice above the sale 

LFS do have a terrible reputation when it comes to advice. To be honest, the zebras and pearls are closely enough related to shoal together, you could leave them at four each. But I don't think the glowlights and tinwinis are close enough to fit in except out of desperation.

Colin is quite right about you have mainly top dwelling fish, and he also thinks coreis would be OK on your sharp gravel (in your other thread)

One of the three 'dwarf-size' cory cats (link)

The database on here only has the dwarf cory in Colin's link. There are 2 more Corydoras pygmeaus and Corydoras hastatus . In the community creator on here, I just enter the habrosus cories for all three.

How small is small?

That is probably at bit small for neons - being a cube, the swimming length is less than a 48 litre rectangular tank. But the tinwinis would go nicely in there, as would ember tetras.