Prestone Driveway Heat not pure?

VaderWS6

New member
I started using Prestone Driveway Heat as my CaCl mixture, and a brown substance has settled to the bottom of the jug! I saw in Randy's article that the Prestone stuff was pure, but what is this brown crap? Hopefully I'm not poisoning my reefs.... :( I've quit using it, until I get an answer on here.
 
Many people see that with the Peladow type materials, and have posted here. I wouldn't worry about it. Probably just a little insoluble iron oxide. None of these are 100% pure. Just pure enough for our reefs. :)
 
<a href=showthread.php?s=&postid=6909798#post6909798 target=_blank>Originally posted</a> by Randy Holmes-Farley
Many people see that with the Peladow type materials, and have posted here. I wouldn't worry about it. Probably just a little insoluble iron oxide. None of these are 100% pure. Just pure enough for our reefs. :)

Man, thats a relief! :)
 
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