Hi, before you set up the rest of your tank. You are more than welcome to see my step-up and I can show how difficult it could be to work in front of the tank. Every day I say I wish I have front access.
The pump has its own timer you can set it to like 3ml an hr every 20hrs or 24hrs or what ever you would like and it will dose the 3ml in an hr for x amount of hours then stop and do it again for what ever you put like say 24 or 12 hrs what ever you would like
I do have a set of medical grade pump they are really high end stuff it pump 1-400 mls per hr and can flush the tube to keep it clean the name of the pumps are call epump kangaroo look them up and let me know if you are interested