Octopus Needle Wheel question

OK I tried following the vast amount of information in the needle wheel thread and sort of got lost. I undestand the basic concept, but am new to pressurized CO2. I was going to try and build Tom's reactor, but after reading the needle wheel thread, it seems this may be a simpler (for me) and easier way to go. I still don't quite understand the set ups and connections.

I looked at the Octopus needle wheel pump that Tom suggested, but i am not quite sure how it fits in with the whole CO2 system. Is it as simple as hooking up the CO2 hose to the needle wheel pump and then sticking the pump onto the inside of the aquarium or am I missing something? I will be using a SUMO regulator, on a 55 gallon with a 250 hot magnum and a 350 hot magnum canister filters.

Sorry, but I am very new to all of this and am a little afraid of melting holes in my impeller blades. And would prefer not to have to build a reactor if I don't have to, espeically if this is an easy and effective way to inject CO2 into my tank.

Any advice and setting met straight would be appreciated.

 

OK. So I can just attached the CO2 tubing to the pump inlet (using the right sized connectors) and then the co2 goes into the pump, gets chopped up, and then pumped out into the aquarium.

I have also seen that I can run the CO2 into the intake of my Magnum 350. How exactly do I do this? Do I add in the tank where the inlet grate is? Or do I drill a hole into the plastic tubing?

Also, if i use one of the method above (needle wheel pump or inline canister) I don't need to use a rector, is this correct?

 

Ok this is an external pump set up right? I will be using a submersible pump. Also if I wanted to run into the filter directly, when someone says to drill a hole in the inlet tube...does this mean the clear plastic tube that is connected to the inlet on the filter and draws water from the aquarium?