Yes LFS tend to tell you what you want to hear sometimes, but I do trust mine despite this. I dont have enough room for five corys so two will have to do for now. I intend to get a bigger tank early next year once I have enough confidence with the two I have now. It has been a big learning curve since I got the first tank at Christmas, totally hooked and have been busy trying to cope with numerous young. Both the Mollie pair and Platy pair have produced alternatively about every two weeks, so its been a concern to keep on top of water quality and transferring the young into a nursery tank and then off to the lfs. I have learnt so much from this forum, its been priceless. So thank you.