I hate to disagree with you, maxxieboy, but when you call a pet store, you can really have no idea if the person on the other end of the phone line knows enough to be advising you or not. If you know the employee from many in-store conversations and you genuinely feel that you can trust her/him with the life of your fish and the stability of your tank, then yes, do call and ask for that employee. However, I have heard great amounts of utter hogwash spewed forth from the mouths of employees who have been hired in without any knowledge or experience in fishkeeping (for employers, finding employees who will show up every day can be challenging sometimes and you often have to take who you can get) that, if followed, will result in fish deaths and worse. I would not rely on the advice of an unknown employee of a fish store without some good corroboration. I get my advice here, after googling for information on whatever problem I'm faced with.