Help with pile off poo 200 tdi

Yea about the size off cap but there's loads more I dumped it out on the road just picked that bit up to show ppl

is it possible that its some sort of coating off the inside of the coolant pipes

is it some sort of dissolving tablet that could have put in header tank to, er, mabe clean the coolant galleries, or inhibit rust build up, or a leak fix kinda thing?
looks like broken plastic on the pic, but then thought it looked half dissolved.
if the rad's leaking then i'd be even more inclinded to remove it and check for signs of the solidified white whale sperm.
you say rad's 5 month old? who fit it and where did it come from?

The only way to describe it it's like limescale hard but dose crumble up there was about 2 hand fulls of it in header tank I got the disco 3 months ago and the bloke I got it from said the rad was changed 2 months ago

receipts for it?
does sound a bit wierd, only plausible thing i can come up with, is someone's
refilled the water from an old sontainer thats had some deposits in the bottom, and just tipped it all in?
do the white things float or sink?
can you get it to dissolve in a pint glass o water?

Yeah got receipt it sinks and dosnt dissolve

receipt for fitting, or just for rad?
if fitted, take it back and ask them what they put in it?

moth balls by the looks of it

Right spook to my mate who thinks it's rad weld, may be the person who had it before me put it in then changed the rad, but didn't flush system out, where it got so hot it's cooked it, what you'll all think

it dont look like any rad weld i've ever seen!