Blue bloon

Blue bloons are quite a slow bloon, it spawns a red bloon and spawns from green bloons.

This bloon comes around the 3rd round on all games and all difficulties. The most effective way of taking this bloon down (taking cost, level and speed in account) is simply buying the dart monkey.

Did you know that the bloon buster upgrade for the mortar tower is the only upgrade that can pop through this totally?