I got one like that...only problem i have is the field of view..and opperation...restricted view...and if you want to see left..you have to move the scope right...hard to get use to...jewelry loupe is better..check e-bay...the higher the magnification the better...
Never used co2 before...i don' have a completely closed grow room...and no the cap and hose shouldn't be needed...might go that route next grow...check this...Parts per million of CO2 | Cannabis Culture Magazine
Yeah man looking good Taylormade420!! Yeh same as me mate mine going slow to me, but yours seems like its just shot up over night!! Your gonna be a happy man soon.....