Bro Soul
Nope te Tunze will not disrupt my sandbed. Firstly, my sand bed is primarily grade 1 sand with some medium size AquaMedic Hydrocarbonate. So it is not entire fine and easy to get blown around. Secondly, I am using 2 Stream 6000. 6000 is suitable for 3ft tank, the are sufficiently strong without causing problem to the sand bed. Of course the Multicontroller 7095 makes all the difference. I set my 7095 to achieve left --> right ---> left current (see pix).