Can too much co2 kill a plant?

So ok for my secn grow I got huge tent with 1000 watt hps cool tube 6 inchinline fan ducting roots organic soil mix peat moss and guano, now the question is can to much co2 kill a plant?
I have been seeing tose new co2 buckets and pumps for sale and all those are are sugar and yeast and i aint paying 130$ for a bucket of sugar and yeast and a pump.
The 2nd Question I have is can I just get an empty bucket and fill half of it with vinegar and half with baking soda and fil the tent and just wait till the co2 dissipates? That way i sont need a fancy smancy co2 tank and pump since im quite poor but not for long, what ya guys think open bucket with baking soda and vinger then refill once it dissiapates or I could do the sugar and yeast way in a bucket?

thats bucket method would never deliver as muc h as my tank does. so no it wont kill shit

a tank is really worth the $ huh how many months your tank last you?

you could make some diy c02 makers by combining yeast and sugar and water but like said above-you should just bite the bullet and get a tank bro, youve already gone this far, might as well go all the way with it. It will be worth your investment. look around on here and you can find diy ones that are pretty easy to make and fairly cheap, dont let them rip you off by paying so much for something that you can make yourself fairly easy for less. ill see if i cant find some in the do it yourself section for you........

true i guess a hundred bucks or so for a tank doesnt really seem to matter now does it as long as the yield is worth it.