co2 diffuser

Really new to this. So you can then send your co2 from your co2 tank right into your aquarium through a powerhead and not have to get a diffuser at all? I dont currently have a co2 system but have been looking at setting one up.
yes, a co2 reactor is a much better method but i didnt have the time/care to make/buy one so i just use this method.

ifyou use DIY co2, make sure you dont suck all the air out of the line with the powerhead, because then you will have a tank full of diy co2 sugar/yeast mixturea nd a bunch of dead fish
 
can i stick my co2 tubing inside my over the back filter and let it dissolve in there?

Yes, I still do this on a lot of my planted tanks. The bubble rate is lower using this method over using a glass diffuser or powerhead. I use all three including an in line reactor on my biggest tank. I also make and install a deflector to eliminate turbulence that is created using a HOB.
 
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