Cacique has given all wonderful info and advice.
Regarding the pet store employees, I have to agree, and that is coming from someone who used to be a pet store employee about 20 years ago. Now when you go into smaller more specialized aquarium stores that deal regularly with more exotic creatures like this as a specialty sometimes they are more knowledgeable and give very good advice, although not always, and can vary from employee to employee, so it is always good to double check the information you are given before you apply it. But chain stores and stores that just teach their employees basic information often do not give full and correct information. There are of course that employee now and then who are very knowledgeable about their specialties and go to work in those stores just because they love that field so much, so they may know a lot more than typical employees of those stores.
To give an example, I used to work at Petsmart and I loved it. I was an employee in the animal department and took care of the fish, reptiles, amphibians and birds. I learned most of my preliminary fish knowledge by taking their little "fish course" certification for which I got a little fish sticker badge thing to put on my name tag certifying me as an "expert". Lol looking back now with all I know about fish, I realize that much of what we were taught was just plain wrong and propaganda to get people to buy things. We were told to tell people to cycle their tank by setting it up and adding some bottled bacteria and then letting it run for at least a week before adding fish. The truth to that is that without adding any fish or ammonia source this is not cycling your tank at all you are just pouring a bottle of bacteria in the tank which will then die with nothing to feed on. Luckily, one of my other coworkers was an experienced fish keeper and knew how to correctly cycle an aquarium and taught me what I needed to know the correct way.
Another more recent example is when I started looking for my first axolotls. I had heard of a local aquarium store that seemed very knowledgeable about their fish and their tanks all seem very healthy with many beautiful well cared for healthy looking fish. I had heard that they carried axolotls and so I went in to ask if they still had any. I was told that the last time they ordered them they sold very slowly and he was left with several, which he then told me had ended up metamorphosing into tiger salamanders. Now if you have looked into what axolotls are, they are related to tiger salamanders but they are not actual tiger salamanders. So the man that I spoke to, which I believe was the owner of the store, obviously got them in as a test run and does not really know a whole lot about axolotls.I guess my point with that is that even if the aquarium store looks very knowledgeable about most of their critters they may not know whole lot about the more exotic non fish animals that they carry.
So yeah, sorry to go on and on, this turned out longer than I had anticipated, but I just wanted to second what they said about pet store employees not always knowing what they're talking about, although there are the exceptions who take care in learning the correct information before they start giving information to their customers.