<p>I have made some prints with the Ultimaker 2+ and Ultimaker 2 Extended+. The prints are in PLA. For slicing, I use Cura and I check the support checkbox (haven't gone to advanced settings to adjust support yet). I can clearly see that there is a little space between the support and the print. The supports often look like long pillars and such. </p>

<p>My question then is: "What is the best technique for removing the support?". Is it to use a knife, pliers or perhaps PLA-water? Is it possible to use PLA-water to remove support when printed with Ulitmaker 2+ or is that just the Ultimaker 3? What type of technique would give a good looking print?</p>

<p>Ultimaker 3 has <a href="https://ultimaker.com/materials/pva" rel="nofollow noreferrer">support filament that's water-soluble</a>. Is there something similar for Ultimaker 2+? </p>

PLA and ABS are hard plastics. They are not water-soluble. If you print with these materials, just snap printed support materials off and clean the interface layer with a knife and sanding.
To remove the support, it is best to use strong tweezers or a pair of pliers to grip and then apply some force. Generally, I use needle pliers, but occasionally I also use snippets to cut up the support towers into more manageable chunks and keep the printed part safer. It can help to remove it in pieces and score the breaking lines.
As PLA is brittle, I prefer to break away from the object and not pull.