▲ 15 r/Vivarium
Advice needed! What’s on my drainage layer?
Hello,
I built my first bio active about a year ago and it’s doing just alright. A crested lives there and when I built it out I included springtails and isopods.
Today I noticed these brown/black growths in the drainage layer. Any idea what they might be? And do I need to be concerned?
u/Potential-Bird-3300 — 3 days ago