Bloontonium Reactor

"Activate submerge using target option to detect camo, pop bloons, and reduce water tower cooldowns 15% (doesn't stack)."

- Description from BTD 5 iOS

 is the fourth upgrade on path one for the Monkey Sub. It allows the sub to reveal camo, in the same way as Submerge and Support, but when submerged, it will also pop bloons with its camo revealer. As an added bonus, it reduces water tower ability cooldowns (First Strike Capability and Monkey Pirates) by 15% if they are within its radius. It should be noted that while the cooldown bonus does not stack with other Bloontonium Reactors, it will still stack with high energy beacon and hotter cooldown (85% total if hotter cooldown is fully upgraded, or 65% total on BTD5 Flash with the premium upgrade). This upgrade costs $2125 on Easy, $2500 on Medium, $2700 on Hard and $3000 on Impoppable.

Trivia

 * This is one of the few upgrades that has infinite popping power.
 * This Bloontonium Reactor acts like a Ring of Fire, but it is used on water and it has camo detection.
 * In Bloons TD Battles, with a regular defense, it can stop a rainbow bloon rush.
 * In BTD5 Flash, multiple Bloontonium Reactors placed close to each other can stack their popping power, and 2-3 of them can stop even a 20170509 211638.png Regrow Ceramic if placed precisely.
 * In BTD5 Mobile, the Bloontonium Reactor has sail planes. On the web version, however, this is not true.
 * If you look closely, the boat looks like a Skipjack class nuclear submarine.