Hi,
They are a colour variant of German blue rams made by selective breeding.
They have the same requirements as german blue rams which are:
1. A low PH of 5.5-6.5, they can adapt to a slightly higher PH but I wouldnt put them in a PH of 8, I'd say 7.2-7.5 would be highest.
2. They require a higher temperature than most community fish which normally makes these not a very good community fish, they need to be kept between 28-32 celcius
3. They need very low nitrates, they will not tolerate nitrates higher than about 30ppm.
Normally when kept outside these parameters they usually only last a few weeks, and thats coming from personal experience, I now have a tank set up specifically for GBR's
If you are wanting rams for a community tank you would be much better off with bolivian rams, although not quite as stunning to look at, they are beautiful fish that really show their colours once settled in a nicely planted aquarium. I have a pair in my community tank.
Andy