Stocking a 129l Fluval F90?

[Ryan Young]

Hi,
For my Fluval F90 which I have recently re scaped, I would appreciate if anyone knows how many more fish I can buy to stock this tank.

So far I have:
5 harlequin rasbora
7 lambchop rasbora
3 endler guppies
2 otocinclus

I would like to buy some more endlers and oto's and if possible two larger fish such as dwarf gourami.

Could anyone let me know whether I will have enough space for more fish, if I will have to compromise or a 'show fish' that I could add to this tank?

Thanks, Ryan

 

[Progen]

Another 3 - 4 otos will be nice since 2's not exactly a group for them.