copper test test tube fell in tank

[Reefinmike]

I had ich a while back in my fish only display tank and shot it with copper, and ive been keeping an eye on it to make sure copper level is up even though ich has been gone for a couple weeks. while testing a minute ago, i thought to myself- "wouldnt that suck if the tube fell in the tank" and then bam- it fell in. it went down face first, and i dont think much got out as it seemed to still have about 5ml left in it, and had the yellow color indicating copper, but im sure some got in. using aquarium pharm test kit. running carbon. any worries?