I started a NPT about 2 weeks ago. Plants and shrimp are doing well. I just noticed there's some cloudiness above the substrate in one part of the tank, kind of reminds me of a low-lying fog. Water params are great. Any thoughts on what it might be?
This tank was filterless and with a soil bed, which roughly what the walstad method is all about. It's honestly probably one of the coolest tanks I've ever had simply because of how the ecosystem took care of everything that we usually have to fight in fish aquariums. Algae was eaten, things that eat the algae were eaten, and everything just kind of worked. Adding any fish probably would have ruined it though, as the ecosystem would have been skewed.
As an aside, why are your plants so sad?
My guess would be either fungus or heterotrophic bactera. It it like a haze throughout the tank but moreso in the bottom third, or is it just junk stuck to the bottom?
My guess would be bacteria that will go away as the tank matures.