[Clerk]

If its an algaecide I wouldn't worry about it all that much. You shouldn't need to use it though.

To control algae just keep lights on 12 hours a day max, 8-10 is usually good, and keep out of direct sunlight.

You will not want to add all 4 at one time, probably start with one. You could use stability or Bio-spira to help cycle the tank faster.

In regards for the chemical, do a 50% water change, and put some carbon in your filter, that will pull it out.