1. you only may see the effect of the presence of a electric field

2. for analogy , think to electroscope. use some hair.

3. protein/ion  migration in electrophoresis is an example of visualisation

2. be sure you have this electric field if the potential is applied (E= V/d).

5. with a potential of 200 V and 1 cm distance between electrodes, expect a migration speed of about 10 cm/day for a small ion in solution. Take your time...

In Jefimenko: "Electricity and Magnetism" there are some nice photographs of the "lines of force" of electric fields. They were "... formed by grass seeds (Kentucky Blue Grass) strewed on glass plates. To make the seeds more mobile, the plates were waxed with liquid wax." The voltage was 10 .. 15 kV but unfortunately the dimensions of, resp. the distances between the electrodes glued to the glass are not given.; if the scale of the photographs were 1:1 the distances were about 15 .. 60 mm.

Thanks very much for your responses cornel and joerg!!

Another question i have: does an electric field exist, no matter how low the voltage applied between the electrodes?

If we discuss physics, the answer is simple: Yes. The concept is general.

But for electrochemistry, the case is more complex: the field is not uniform, a significant part of the potential loss is near the electrodes. The electric field is very low in the bulk solution.

Dear Anubhav Bussooa, I suggest you to use UV camera. It has been very effective to get clear images related to charges activities under electric field stress on electrodes surfaces. See, for instance, Figure 6 in the paper of the attached link. 

Conference Paper Correlating Digital Measurements of Electrical Quantities an...

It is not clear what voltages you are talking about. But you could place the electrodes on resistive paper like http://www.timstar.com/el91430-teledeltos-conductive-paper.html and measure the voltage at various points. https://youtu.be/Saf9fYXHnyA

If there's no voltage, then there's no field.