Yes, if the atomizing attachment can be refilled, you can use any liquid you like in it. Halo's devices are solid. Their liquids, some are decent, some are not. Remember, with liquids, taste is subjective, and unique to the user. Fruits and tobacco flavors are my prefered types, others can make me cringe like cinnamons, though a good tea flavor or creamy bakery flavor is a nice change up. You might like beverage flavors or something else. Best advice, try something that you think could spark your interest really well, check for vendors that offer sample packs to start, and look into a basic dripping atomizer for juice testing before commiting a flavor to a cartomizer or tank. Cig-alike systems are nice for being out and about and being stealthy, but most times have short legs, very low vaping time before you are swapping out a battery and putting the old one on to charge. Looking at one of the Halo systems, I'd suggest look at the Triton system, with the G6 as a backup system. You'll learn quickly in vaping, backups for your backups once committed, battery or atomizing device gives out, you always should have a fall back system until you can get the other replaced to keep you off tobacco, even if that backup initially is a disposable. Good luck on your own journey to freedom from tobacco.
I'll 2nd the Triton with G6 as a backup. Cigalikes definitely have their place.
Questions... Which flavor of Blu disposable have you been using? Classic Tobacco or Menthol? How long did one disposable last for you?