Coolant additives

[Monkeypillow]

I have a 5% mixture of Swiftech's Hydrx coolant in distilled water, and my order from Petra's came as I am typing this, there's some PTnuke in it.

Is it alright to add a drop or two of PTnuke to my loop, or is there something I'm not aware of?

 

[Nsillej]

you dont really need it, Hydrx has a biocide in it.