Calcium Reactor no probe insert

[toyfreak]

I am setting up a calcium reactor and I was wondering if the reactor doesnt have a probe spot where should I place the probe at? The directions I printed out show a spot in the calcium reactor but there is no port for it. So where should I place the probe so the controller will work right?

Thanks
Ryan

[AZDesertRat]

I suspend my probe over a Lee's specimen container like they catch and bag fish in at the LFS. the container hangs on the side of the sump and the reactor effluent drips into it then overflows into the sump. Works well and gives me the reactor effluent pH I need to control my reactor via the RKL.