little brown dots? can you see any cell structure when you look at them close or with a magnifying glass, even a 3x will show this cell structure, if it is I think they are some form of POD due to maybe overfeeding. From what ive read on them because I had something like that, and everything I found out points to edible and 100% OK for the fish, dont feed for a few days or feed very light and do a wicked gravel vac but stir the gravel to get em up into the water then suck em down.
That's not a planted tank. That's a jungle with glass around it- MFDROOKIE Circa 2011