I dunno know if you got your question answered or not but here are my thoughts on what you need to do.
Get the macro lens of your choice.
Use a tripod.
Turn off the pumps.
Clean the glass.
Shoot straight through the glass, any angle will produce distortion.
Put the camera in manual mode.
Practice, practice, practice.
Also, you need to have a basic understanding of photography(exposure, ISO, aperture, shutter speed, etc) for it all to come together.
HTH,
Robb