atiz
Well-Known Member
I guess your question is a bit OT so you may want to move it to a new thread, but here is what I do.Ok thank you! Which preservative do you prefer and at about what temperature do you add it to the mixture?
I use liquid germall plus mostly because it seems less finicky (in terms of pH) than some of the other broad spectrum preservatives. I add it to the mixture when it is lukewarm (it has to be below 50C, about 120F, but I like going below that). As I understand it, you want to check (1) that it be a broad spectrum preservative (if you are using only 1 -- you want it to cover bacteria and fungus); (2) the recommended pH range; and (3) the recommended temperature range. You should be able to find all this info on the label / product description. There is also a pinned post on this forum for comparing preservatives.
I know some people use multiple preservatives at the same time; I have not had problems with LGP so it just isn't really worth the hassle for me. But also, LGP is not recommended for sprays so YMMV depending on what you want to use it for.
Cmzaha's point is a good one, if it would take too long for large batches to cool before adding the preservative, that might introduce some extra risk of bacteria. I only make small batches for personal use so that hasn't been an issue for me.