Sexing German Blue Rams

Hi All, I bought a pair of german blue rams at the weekend, sold to me as a male and female, but I'm having my doubts. Initially, they settled into my tank OK(Fluval Roma 125). However, over the last couple of nights I have noticed them being agressive towards each other. It's not all the time, they can be swimming together nicely one minute, and then they would turn to face each other and attack. Don't think there has been any damage done. Anyway, after researching a bit, I think I might have 2 females? The biggest pointer for me is the pink bellies? I just want a bit of confirmation before I speak to my LFS, and possibly swap one of my females for a male. Here's a pic of each fish. What do people think?

Pink bellies are a sure sign of females, so yes, you do have 2 females. The other thing to look at is the black spot. Females usually have blue scales inside the black spot while males don't.

I would see if you can take one of the females back. And the best thing for the fish would be to bring back two males, making sure the shop will take back one of them later. Rams like to choose their own mates so just getting one male may not work out as they may not like each other.
Perhaps take both females back and study the tank to see if two rams have paired up - they will allow each other in the their personal space while chasing all the other rams away.

Gorgeous fish

The usual recommendation for brightly coloured hard water fish is Rift Lake cichlids, but they also like low nitrate.

These rams are highly inbred rather than being naturally coloured. Most of them seem to die pretty quickly anyway, whatever conditions people give them. Even if I had suitable water I wouldn't touch them with a bargepole.

It's part of what I call the "coral reef" syndrome, people looking for fish with the colours that they see on TV, but very few freshwater fish are like that. Lake Malawi looks a bit like a reef underwater, which is maybe why the fish are so colourful. But they have to have their own tank (without plants) and most of them don't get on with each other, typical cichlids in that respect.