Hi, I was a bit tired and came home with a bag of perlite instead of the planned vermiculite. Naughty Wilkos keep them side by side to confuse us! What's the difference? Vermiculite is great for mixing into compost to germinate seeds and I generally throw some in when repotting house plants. Is perlite as good? Would it suit succulents or does it have some lurking chemistry which will poison the plants? Thanks very much!