I set up my first tank (50 liters cube) about 4 days ago. It's quite high-tech:
- CO2 injector
- Macro + Micro fertilizers
- 6h / day lightning
- I added some aquarium starter fluid
- Decent filter with a bunch of ceramic rings (not colonized by bacteria yet)
There are no animals in this tank, plants only. The water is not really crystal clear - it's a little milky.
I noticed some whitish goo forming on the gravel and driftwood (see the photos below - what looks like cloudy glass is actually this goo growing on gravel). This goo is quite solid, it waves.
What is it exactly? Algae? Fungi? Should I care and take some action or should I just wait for it to pass?