I remember I stuck my hand in my tank once to grab something and I had a long spine diadema. All of a sudden it was like "OW" freakin FUDGE
lemme tell you it hurt for a few days first I tried digging it out with a needle the barb kept going deeper then I used a sharp razor to split my finger open hoping to pick it out didn't work went to the hospital waited for 1.5 hrs and the doctor looked at it then said go home take hot water and vinegar and dip your finger in for 20 mins at a time and repeat for a day. I said Vineger? He said yes it will help to dissolve the prick so I did it. Maybe it worked but at that point I was willing to try anything even ****ing on it. Never owned another one since.