Malathion & R.O. Water

[lycaonpictus]

So I used malathion today for the first time (thank you, brown soft scale). Because I always use R.O. water with my tolumnia, I mixed up the malathion (liquid) at the recommended dilution in R.O. water. I immediately had white globules dispersed through the water -- like fat, or oil. I went ahead and used the mixture, agitating frequently to keep whatever that was (the carrier?) in suspension. But I'm wondering -- is that normal behavior for malathion? Or is this something to do with using it in R.O. water? Should I use tap water instead next time?

Thanks in advance!

L.P.

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