right now I am also using my phone for about 99% of the time completely understand the mis types, smart phone with swype keyboard sometimes decides to say some interesting things. The purple stuff that showed up was it on your rocks or other places in the tank. If you by chance have pictures of it our are able top to get pictures of it I would suggest posting a picture in the saltwater section and see if one of the more experienced members can help identify what it is. I know that I have issues with trying to post pictures here from my phone if you have the same problem you could try using photobucket and try that method for posting pictures, I know for my phone it is a free app. Also do you know what the water parameters are, this would probably help for the experienced saltwater members to be able to help. I am not sure how many of the salt members follow the intro threads so I would definitely do a post in the saltwater section where one of them is more likely to see it.