Yes I have an Apex. Thank you for the info. Where did you get the APC and DCI from? I have need reading about Jeabo \ Apex hacks. But the way people have done it there is no variable speed. It would be cool to have it all working.
I bought the apc used and the dci from bulkreefsupply
It basically is a pass thru for the rj11 jack and it then adds in the 24 volt power for the pump.