Quoted from "Pilo"

If I'm not wrong and remember correctly, there are probably three cases the temp sensor can appear in the Aquasuite.
The first is, if you have the pump connected only via USB to the motherboard, the with the pump connected temp sensor only shows up in the Aquastream section of the Aquasuite. You could not use this temp sensors output data in the Aquaero itself or in the Aquaero temp sensor section of the Aquasuite, for example as data source in a virtual temp sensor or to temp control fans connected to the Aquaero.
The second is, if you have the pump only connected via Aquabus (4 pol. cable) to the Aquaero, the temp sensor connected to the pump should additionally only show up in the temp sensor section of the Aquaero in the Aquasuite. The sensor would appear in and behave just as s temp sensor connected directly to the Aquaero with all its benefits.
And the third is, if you connect the pump to the motherboard via USB and via Aquabus to the Aquaero, the temp sensor would appear in the Aquastream section and Aquaero temp sensor section in the Aquasuite.