I started Bubble Mania a few weeks back and I really like it so far! It's a great time ****er for me. I'm currently waiting on energy so I can get enough stars to start the 8th island. I have a question though.

What boost do you use the least? So far I haven't bought any gem boosts, but even if I did, I doubt I'd use anti-toxin. I haven't had a problem with the poison bubbles. I haven't used the rainbow bubbles either, though I can see how those would come in handy.

So is there any boost that you haven't used/you don't think is worth it?