
It looks like SDS and Annadvn have you covered.
The tank height recommended for these cute little guys 12" with a max of 18", however, anna's is taller and she's had hers for 6 months and seem pretty happy.
They can live with a ph that ranges between 6.5-8.2. My ph is 7.6.
If you're planning on getting a couple, it would be a good idea to get both at the same time because of the Chytrid Fungus. If you get one now and one at at later date, it's recommended you quarentine the new one for two months.
You should be aware of this:
Chytrid Fungus in ADF's and ACF's
If you plan on having them in a community tank, make sure they get a chance to eat.
They hunt by smell and their eyesight isn't that great so the fish might get the food first.
That being said, one of mine sees me coming and dances around waiting for his blood worms to drop in. He's by himself in a QT so he doesn't have anyone to compete with.
They're a lot of fun, you'll enjoy them. Good luck.