Eels are not a hardy fish like a goldfish, cichlid, or several others that can be used as starter fishes. That's true about pH and temperature for most fish, some fish this is not the case. Basically, a basic knowledge of fish health (the disease symptoms and how to treat them) is very important, and the routine of tank maintenance.
-----
Phishie
Site Coordinator

"An ounce of prevention is worth a pound of cure."