Aspire vape pods are incredibly versatile when it comes to what e-liquid can be used inside them. This is down to the wide range of ohms resistance coils available in each different Aspire pod.
If your coil is 0.8ohm or higher, it's recommended to only use 50/50 e-liquids with these coils, as they're designed for MTL (mouth to lung) vaping, and 50/50 e-liquid compliment that style of vaping perfectly.
If your coil is between 0.6ohm and 0.8ohm, these are more tailored for restricted direct to lung vaping, and whilst you can still use 50/50 e-liquids with them, it does also open the door to you being able to experiment with High VG vape liquids too.
And finally if you're coil is of low ohms resistance, around 0.4ohm or lower, these are classed as "sub ohm" coils and designed for direct to lung vaping so you'll want to use High VG vape juice to ensure you get the full experience!