Dear Sirs,

Good afternoon, I'm running 4 Tunze Stream Pumps in my reef. 2x models 6095 and 2x models 6105, the 6095 have between 1 to 2 years old and the 6095's have 1 year old. I'm trying to make this pumps to work synchronal between each other (permanent opposite) but when select on profilux minimum power below 19% they simply stop during that period (<19%) and then start work again(>19%) till maximum selected (i.e. 60%). Is there any chance of making this work below 19%?
My profilux characteristics are:

ProfiLux 3 eX
SN: 1110052012
Firmware 6.19
Pumps Connected in 1 group
2x pumps via splitter L1/L2 port
2x pumps via splitter L3/L4 port


Kindly regards
Pedro Ferreira