Thanks for lending the pump to me, Anthony. Alas, I "fixed" the Jebao, don't know what exactly happened but when I took it out and readied the spare pump, this one started working, so...
Only a matter of time till it fails though, so I will be on the lookout eventually for a new return pump.
Bonus, I found my long missing/assumed dead antenna goby in the return chamber and tossed it back into the DT!
