The aero cloner works with without any additives, but the cuttings don't really grow well once they've started rooting. I've found that using the clonex bottle solution that contains the broad spectrum of nutrients in a weak amount actually allowed my cuttings to grow once they started rooting in the cloner. But did I have 100% success without the clonex? Yes, however, the clones always showed deficiencies and took longer to start growing when transplanted to soil because the water was deficient in nutrients and they were trying to synthesize new growth with no raw materials (I was using RO, not direct tap). Once I started using the clonex, they actually grew in the cloner while rooting, and I observed faster recovery when transplanted into soil. Now I know that the cloner will produce water roots, which aren't soil roots, but having the nutrition in the cutting, when moving to soil, makes a big difference compared to planting a cutting that is deficient already. For me, it's worth the few bucks for the bottle of synthetic junk. I'm okay with using it for cuttings, because the results are better than not using it.
FWIW, I've used aloe with success just out of curiosity. It seemed to take a few days longer than the clonex gel. But I still have this bottle of clonex gel, and I'm gonna friggin use it haha. I'm just careful not to get it on me, and if I do I rinse my hands thoroughly immediately. Usually I just dilute 5-6 drops of the gel into 3/4c of water and soak the cuttings in that for 12-24 hours. It really makes the gel last a looooooooong time.