Bloon Adjustment is a upgrade for the COBRA. It is the second upgrade on Path 1 and costs $550. The upgrade either makes a naturally sent BloonCamo, Regrowth, or one rank higher (up to ceramic). It works for any mode, including Defensive Mode. Multiple bloon adjustments can layer the effects, for example the round 12 Camo Green can be a Camo RegrowthYellow and round 10 Regrowth Yellows will be Camo Regrowth Pinks. This makes it a very deadly upgrade for earlier rounds if you get enough. It is one of the best strategies to win using COBRAs.