Hi i can confirm that EKWB D-RGB water block can be controlled with Commander pro.
I just had to hot-wire one end of the RBG extension cord ie. Akasa AK-CBLD01 (unless you want to cut the wires directly on the block cable and loose warranty) to the Corsair LED stripes entension cable that comes with the LED stripes on the other end. You must keep the correct pin layout (+5V, digital, GND).
Works just fine incl. all the cool effects, rainbow waves etc. that your Commander can do with an ordinary LED stripe.
To fit the custom EKWB kit (Velocity D-RGB + Coolsteram SE280 + XRES 100 DDC MX 3.2 PWM) into the tiny Coolermaster HAF XB was quite a challenge though xD. But had no choice since my Corsair H115i died after 3 years of hard work :(
