Fally, i would have to agree with Angel on the subject of not going back to that store if they don't use RO/DI water in thier own tanks.

with that being said, i have to admit not using RO/DI water. but at the same time my water is better than 95% of water in the U.S.( registers a 2) my brother in law is an enviornmental chemist and he does tests for me. but at the same time ... i am going to add a RO/DI unit to my system as soon as i can.

until you do add the unit i would steer clear of corals that would be considered "fragile" or less hardy until you get one.

hope this helps some ...

see ya round