I love my Triton system, but keep hearing about polycarbonate tank degradation and BPA- especially with sweeter juices, so want to try a Pyrex tank. The ViviNova looks like a winner, but I wouldn't know where to buy replacement parts- unless it is disposable, or which ones, so will probably get a ProVari and a couple ProTanks to test out. Thanks for all the info.
It's not sweeter juices, per se, it's ones with certain ketones like cinnamon, banana, cola, and those high in citric acid. Since vendors use different recipes and other factors (like flavor shots) have to be considered, not every potential tank cracking juice will actually crack a tank.

EEEKKK! What happened to my tank?