Hi Smoker, welcome to the forums,
Good news: On this forum and this thread -
aquaero 5 - Softwaresensoren [alpha1], (the post where he says this is about middle of page, on page 2 it is in German, you may need Google Translate) Sebastian has already acknowledged that the programmers are aware of the problems with memory leaks and are working on it. There was a screen capture below the one mentioned above that showed one user had over 1 GB of leaks in 16 hours.
As for the Aquacomputer-service.exe module, that supplies the data from Speedfan, OHM, etc, it is only an open alpha test version right now. According to Sebastian, the only thing they were looking to verify with this release was that the software was able to communicate properly with the programs that it needs to communicate with. And it does, very well. The programmers are aware of the memory leaks in this module as well.