I decided that the best way to combat the cyano in my tank was to do some deep cleaning. In that vein, I have been seriously vacuuming the sand bed (and seeing lots of detritus coming out). The cyano has been retreating well, but then someone warned me of more toxins in the sand? Like, I don't have enough troubles?
My sand is maybe 2-3" deep, no more. Do I really need to fret over this?