Your wasting your time over there.....
The simple answer is NO, they can't do anything remotely like that, you can't even have it change the speed of the pump based on a button or a mode (i.e turn the return pump down to 30% on feed timer). In fact you also give up being able to vary the speed of the pump (other than low or high speed) once it is setup. You would think you could tap the pump icon and set current speed, that is a big "negative ghostrider", even in auto constant mode set to 80% output the output is not 80% (in the app or the pump output), it will be higher like 87 -93%. The whole thing is a farce for variable control of pumps, especially return pumps. If you talking wave pumps, you can't even change the scheduled throughout the day, it is one schedule all day and you can't vary/change it (so say you want the wavemaker to pulse during the day and switch to random of a night then too bad).
And as hydros doesn't allow outputs, inputs or schedules to be used by multiple setups you can't even create a bunch of "virtual" outputs (for different pump speeds at different times on different schedules) to then work around the "code for you" menu interface that doesn't allow you to code or nest basic if/then logic.
I primarily wanted to have it change the return pump speed on feeding, low power and ideally use the flow meter to maintain a flow between 2 set levels to automatically adjust pump speed up as pumps slowly slow down between cleans (so gate valves don't have to be fiddled with over time). But alas such basic things are not possible making the control of pumps via 0-10v output almost completely useless and not at all fit for purpose for any pumps really.
P.S. Not interested in Jeff or Danny bias response, even though I am sure we will get it anyways