My Porsche had alien blood

[Ebell914]

I know these cars are out of this world! But my box had green blood in its veins! No really, I drained the coolant for a w/p change and the impeller was perfect, thank god, but the coolant was prestone green!!

When I refilled, I just put distilled water. I plan to drive it a couple weeks and drain and refill with Porsche fluid/distilled.... I don't know what knucklehead cheap ass did this, but how damaging is this and should I take further action to clean out? It has been the fluid in this car for at least 20k and 3 years...

Any feedback gets beers on me next time in Charlotte!! Lol