Bleach actually worked well enough in my eco when we ran out of blue goo for the final round.
That said, I bought a bunch of the RB 7-something from Clavey as it was recommended by buddies. Blue goo seems to knock the odor down a bit better and this stuff was cheap compared to the Groover Tamer---which I love but is wicked expensive.
Some people do swear by PineSol as a solution as well. Does seem to help odors when I let it sit with some water in the tank after its been cleaned/emptied.
Best of luck and remember shit is most likely gonna smell like shit in 90+ degree heat no matter what you do.....so its always best to have another boatman carry the groover