Hello,

Add-on vs. Adaptive mode: What’s the difference?
The Control section gives you the option to choose between two different control modes. Regardless of which one you choose, the setup process will be the same. The differences between both options are explained below.
Add-on mode: This mode allows the control device (KHD or IOND) to make calculated adjustments to single dose amounts by using ml amounts.

Adaptive mode: This mode allows the control device (KHD or IOND) to make calculated adjustments to single dose amounts based on a percentage rather than ml amounts

https://www.aquariumcomputer.com/kno...adaptive-mode/

Gaël