Hi I have just set up a 10 gallon aquarium and am concerned about alge growth.?

My last aquarium had an outbreak of alge all over the ornaments and plants. In vancouver I have seen a pet shop with aquariums that have virtually no alge for the past 6 months I have visited.How do you think sha manages this?When I ask her she ejust says she changes the water everyday and makes sure most of the food is eaten but however I tried that without similar results, and we are in the same area with the same water source.I was wondering if you could tell me what is the best things to do to keep the water clear and alge free. Bio geek could you please advise? Help would be very much apprciated. thank you!