Haven't used the tank, so it actually might be fine. But it won't solve your core problem, which is coils gunking up quickly.
Try it and see, a spool of clapton wire is a fiver.
You might also try a different juice with the same flavour profile - it's been my experience that almost anything marketed as 'premium' is loaded with sweeteners. I think Vampire do a rhubarb and custard flavour, don't know if it's any good mind as I'm not a huge custard fan.