Quote:
Originally Posted by swapnils
but is it necessary to have a co2 cylinder n other equipments to make plants survive  is there no other cheap option to do it  I mean getting a co2 cylinder itself is costly.
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If you have a DIY ("do-it-yourself") CO2 system, then it all will be much cheaper. If you want a DIY CO2 system, I strongly recommend that you ask about it on PlantGeek.net (I know nothing about how to make it). You do not need a cylinder in a DIY CO2 system.
Curtis from Plant Geek knows A LOT about how to make your own CO2 system.