<a href=showthread.php?s=&postid=8974850#post8974850 target=_blank>Originally posted</a> by jbrunken
Yes, I'm hesitant to buy the "Freeze Guard" for that very reason, but I doubt if I'm going to find Mag Flakes around here anywhere. I'm gonna check a few places tomorrow, but I'm not going to hold my breath.
There is one person who posted here on RC that he is using the "Freeze Guard" product with no problems.
In any case, I'll probably pick up some of the prestone stuff tomorrow, as the ALK/Calk is what I'm really after and It wouldn't be the end of the world if I had to keep using a commercial Mag suppliment.
-JB
This sample has much more ammonia than Greg found in MAG flake, or than I found in Dowflake. I'd be wary of using it.
If you get an ammonia value (and it is accurate), then the idea would be that in a reasonably sized addition, that ammonia not rise appreciably. I'd never want ammonia to rise above 0.1 ppm total ammonia. I work through that in the article.
So in this case, a 1200 to 1 dilution is the limit that I'd consider adding because of ammonia (again, assuming it is accurate). That limits one to about 40 ppm of ammonia. I WOULD NOT USE THIS MATERIAL IN THE WAY THAT I DESCRIBE IN MY ARTICLE, WHICH IS A SUBSTANTIALLY LARGER ADDITION THAN THAT. I'd add it in many much smaller additions.
I'd also add it very slowly the first time in case these tests are off.
You only use like 50 cents worth a month (even with shipping) . Seems kinda silly to put your tank at risk just to save like 2-3 bucks a year.