Here are pics of how im doing it right now on the 2 tanks I have running this way.
37g w/xp1 that has an iwaki md-10L inline before the filter to chop up bubbles + increase flow.
Mini-M w/2213. Co2 is injected into intake pipe.
Both work great but I dont plan on using a pre-pump on the 60-P.
Thanks for the ebay link. I believ thats where ill get it.
I inject co2 in line before the 2217. Pictures in my thread.
You can attain your ADA + MH deams vicariously through this thread.
BTW, fishneedit 70w'er is only $109 + shipping.
I like the MH, i've been dying to do a MH 60cm but i just cant afford it
live my dreams for me?
2217 is the way. If I could fine a pre-owned inline cal aqua diffuser I would probably jump on that to keep the gas out of the filter. Good idea.
2217 gets my vote, you can never have too much flow. I'd suggest the new inline diffusers that have popped up on ebay recently. You'd be flying.