You should up the numbers of otos as these are shoaling fish, like I've already said. At least add one more to make 4.
Blue rams need much warmer waters than most community fish - more like 28c - so these aren't ideal with otos and neons already in the tank.
A pair of a.cacatuoides would be a nice addition, these are better in a trio of 1m 2f with plenty of caves and hiding places, eg mopani wood.
I would go with:
Trio apistos
6 otos
10-15 neons
Blue rams need much warmer waters than most community fish - more like 28c - so these aren't ideal with otos and neons already in the tank.
A pair of a.cacatuoides would be a nice addition, these are better in a trio of 1m 2f with plenty of caves and hiding places, eg mopani wood.
I would go with:
Trio apistos
6 otos
10-15 neons









