"If you use scissors to cut caulerpa, it will release a little of this toxin plus gelbstoff (basically a yellowing agent into the water). Luckily a activated carbon is excellent at removing the gelbstoff. The question is, does the activated carbon also remove the caulerpenyne??? Most people recommend a pinching action to reduce the amount of the the toxin and gelbstoff. I.e. Pinch and hold the pinch for a couple of seconds. "