1 AC 70 and AC 100 on a 55GL tank
there is none coming from the filter, they are clean I clean them monthly
Weekly WTC.
nothing changed in years just adding more liquid ferts and added some more plants.
Never had it before.
For a second i thought it was algae, looked in some parts stringly looking.
Where is the detritus coming from, I do not see any free floating in the water.