Anyone know where to buy MAG Flake locally

serpentman

part time superhero
My tank is low on Magnesium. I went to Lowes and HD and found Prestone Driveway Heat but not MAG Flake. I know MAG has been proven to work without raising NH3. However, I don't know anything about the Prestone stuff. Has anyone ever tried it?

How about MAG Flake, anyone know where to get it?
 
Its doing very well, man is it big!

The only reason I am hesitant is in order to raise levels sufficiently in 300g, I will have to add a ton which will cost a small fortune.
 
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