what's this stuff inside the tank?

OneLethal87GN

R.I.P. Lethal GN
I've noticed for quite some time that there is a white foamy looking substance inside my tank, mostly covering the pump. I've used only pure denatured with the Lotz lube since I got it new. Is this normal? What is it and is it damaging? The kit still works fine, I was just a little worried about this stuff.
 
I have the same thing. Im not really worried about it but just curious as to what it is. Like you said the kit works fine, but just looks weird.
 
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