Zany Juice is an Exotic Powercard in Bloons Card Storm, introduced in version 5.0. When played, it adds 35 health to all charges of one random Bloon card in the player's hand. The affected Bloon card glows briefly, which is visible to both players. This card is playable if the player has no Bloons in their hand, but doing so has no effect. It can only be added to Zee Jay decks.
Zany Juice can be combined with a low hand of Bloons to begin aggro. It's best used with exactly 1 offensive Bloon card on the hand for consistency.
Good candidates include Double Attack Bloons (especially Double Red Bloons for how cheap they can be afforded) and Triple Threat Bloons for their synergy with health buffs, as well as cards with lots of charges, like Swarm Yellow Bloons.
Ninja Kiwi proposed a nerf to Zany Juice on Version 5.2 by decreasing its Health bonus from +50 to +40 Health. Community feedback proposed a further nerf to +35, which was approved in the update.