No tricks I know of. Have you had a look at night? Some of my fish seem to let the shrimps have a go at them anytime, but I've noticed that there's a lot more cleaning activity at night, when the shrimps litterally jump on the half-sleeping fish, who are a bit slower to shake them off. They often go for a ride around, before eventually being shaken loose. Very amusing to watch :smiley:
Do you know how to go about doing a dip?