I never had a tank crack with anything but Anise when I first started mixing. Then I found that steeping (week or more) was key to releasing the heavy solvents used for extraction. Let your juice air for a day or two then steep for at least a week and nothing should crack your tanks. I use it all Citrus, Anise, Cinnamon whatever no problem. I even vaped my Anise based juice in an H2 clearomizer which are some of the cheapest plastic tanks available. I have all types of tanks for testing ranging from C4, C5, H2, Evod clones, iClear30's, iSmoka BCC, Vivi and Kayfun clones.
It's best to always test your juice in a cheap clearo before using it in your most expensive tank.