Well, yeah, I would. Lots of people use it without issue, but for me, better safe than sorry. Calurpa has many drawbacks. As stated previously, it can atempt to spawn and foul your water, it's very invasive. Let a little get into your display, and you never get rid if it entirely. Also, when pruned, it can release some mild toxins into the water.
If it were me, I'd get it out as best you can and start using some cheato. Then you can run your
fuge light on a reverse light cycle, and get some benefit to your
pH stability as well as nutrient export from the algae.
