Removing Bloom Biofilm is one of many environmental hazards you'll have to deal with in Subnautica 2. This tough, web-like organic gunk seemingly enjoys blocking doorways to various colony ruins, which is especially annoying when you're hoping to get inside so you can scan and steal everything in sight.
Two of the ruins I accessed by clearing the film also contained some really fun posters that I immediately scanned and put up in my base, so keep your eyes peeled for those.
How to get past Bloom Biofilm in Subnautica 2
You can remove Bloom Biofilm with the Sonic Resonator tool. All you need to do is take it out and then hold the right mouse button (or RT on controller) to charge the blast. Once the meter on either side of the reticle is fully filled, release it while aiming at the obstruction.
This will destroy the film, allowing you to get through whatever previously blocked doorway you were trying to access—usually a colony ruin with some tasty gadgets and posters to scan inside.
As detailed in the linked guide above, you unlock the Sonic Resonator by scanning it in at a few locations through the map, and then you can craft it for:
- 1x basic battery
- 2x titanium ingots
- 2x lead
- 1x wiring kit
Loose lead is a little tricky to find (more on that in the linked guide too), and you'll require the Processor facility to produce titanium ingots. You can scan one of these in the Old Habitat colony ruin about 350 meters to the north of the Life Pod. Beyond that, basic batteries are easy to craft, as are wiring kits once you find some silver.
