I have a 2026,AM 1000, hydor on the output, the only way I get it to prime without pushing the primer button a thousand times is to fill everything with water, all lines and reactor, starts up easily after that.
I fill the canister up far enough that it spills out the sides when putting the lid on. The reactor and all hoses are full when I put the disconnects back on. You have a trick I am missing? When I reconnect the lines the reactor empties itself out into the canister and that's the point where I am screwed. I wonder if I can just pour water into the open intake/output on the lid of the 2028 before putting on the hoses to top it off?
Also, are you happy with the flow on your 2026? The flow on my 2028 seems terrible now.