Not sure if this is the right section for this question but for a week and a half I've had this cloudiness in the water column that looks like wisps of smoke, sometimes with yellowish tinge to it.
This is a Walstad setup that's been running for 8 months with no problems outside the initial phase.
This is how it looks in the evening before the lights go off:
This when the lights are off for the siesta period at noon (5on-4off-5on):
And this was today right after the lights came back on after the siesta:
This is the most concentrated I've seen it yet. Off course after the lights were on for a while it diffused throughout the water with more density in the upper layer.
NH4, NO3 and NO2 are all at 0, as always. Well, NO3 is normally at 1ppm but now at 0. Today I did a GH and KH test just in case and found out they are both at 6 instead of the usual 11. However, the last time I measured these was at least 3-4 months ago. Thus, no idea if this is a recent development.
Fish seem to be doing well. They're eating and look alright, for now at least.
Does anyone know what tis is? More importantly does anyone have any experience with how to deal with it or what could have caused it?