I ended up going with a Fluval 306 canister filter. That part was easy and I just used my media from the two HOBs. The diffficult part was the cerges reactor. I had no problems building the reactor itself, but no matter what method I used to connect it to the output of the filter, it leaked.
It would fill up the reactor and then struggle to stay primed, and then I would see a small leak at the output connection point. Plus it was HUGE. So I scrapped all of that cerges stuff. I am sure it would have worked well had it not leaked, but it just seemed like a hassle down the road.
My plan now is to use a ISTA max mix reactor, plumbed up to the powerhead. I dont want to mess with the piping/hosing of the filter and my cabinet under the tank isn't that big to be putting lots of stuff in it. I also think I will get some more plants. AFTER I get this CO2 thing figured out,
For now, hook up max mix reactor, try to get the CO2 levels right(as right as it can be at first, I am sure there will be some adjusting), put more plants in.
BTW I really like the Fluval 306. I dont like the input and output pieces that go in the tank. I am going to be looking for something else to replace those in the future. Any suggestions there would be appreciated.