I dont use the Aquastar but do use Loxone to control my Koi Pond (15k litres). It controls the 2 filter pumps, 2 air pumps, feeding as well as monitoring water meter, temps, filter maintenance and flow rates, and eventually it will control heating.
Its great, fish get fed based on time of year and temp of pond, filters will turn off while feeding so food doesnt get sucked in. Air turns off so we can see fish better when near by, Pond and Garden lighting goes on at dusk if people are around (motion detected in kitchen or office, and alarm is not on)
Reminds me when filter maintenance is required, and will auto top up water once done. Loxone knows when there is too much water being used, and so will tell me. Its usually means a filter is blocked, or i have left a tap open, or there is actually a leak somewhere.
Overall its brilliant, prob could of been done with other more specific pond stuff, but i like its all integrated into my system, so very pleased. Been running about 4/5 years, and the leak detection has been particularly useful.
At the time i did look at the aquastar, but it limited me on the type of filtration i could use. Bead filters require high powered pumps which i didnt want to use 24/7, so didnt go that route, my electric bill is pleased, but manual maintenance is a pain!