Before you get anything you really need to know what the general hardness (GH) of your water is.
If you get soft water fishes and put them in hard water they won't do that well, and if you get hard water fishes (like African Rift Lake cichlids) and put them in soft water they won't do that well.
Contact your water supply company or visit their website and find out how hard the water is. If you can't find the information take a glass full of tank water to the pet shop and ask them to check the GH.
If you get soft water fishes and put them in hard water they won't do that well, and if you get hard water fishes (like African Rift Lake cichlids) and put them in soft water they won't do that well.
Contact your water supply company or visit their website and find out how hard the water is. If you can't find the information take a glass full of tank water to the pet shop and ask them to check the GH.