Copper Lungs

Create: https://modrinth.com/mod/create

Miner's Lung: https://www.curseforge.com/minecraft/mc-mods/miners-lung

This mod activates the Diving Helmet/Copper Backtank when in "red/yellow" air quality zones to use the air supply instead of drowning. This gives you Water Breathing ("Free Breathing") and uses time/air from the tank as usual. Air is used at the same rate in either zone.