co2 tablets

hi .........has anyone ever used these and would you recomend them?
http://cgi.ebay.co.uk/ws/eBayISAPI.d...tem=4361962098

i would not use them as it is not the roots that need them, it is the leaves. the roots would love oxygen. my opinion is that co2 tablets are a waste.

Check this out of you want to know about Co2 tablets.

http://www.nomercy.nl/en/framesets/fs-prod-co2tab.html

Peace

yes did not notice anything.stay slippery