Hey Griffin,
Yes, there is a maximum pumping rate of 0.02. It is set on line 2020 of the current app.py on github, here:
if(Pump1>0.02):
Pump1=0.02
You could increase that.
In practice the reason for it failing shouldnt be air pressure but rather that if your peristaltic pump is not making a good seal with the tubing through it, the liquid will slowly retract backward through the tube as the seal in the pump head isn’t fully blocking this. This CAN be an annoying problem as it may lead to fresh media bottle getting contaminated. I’d strongly recommend fixing that rather than the code – which can be done by adding some tape to the pump head as described in the troubleshooting guide.