I have done the sugar and yeast co2 and it's a bit of a pain to control. 1 week you may be at 1500ppm and the next at 1000ppm. For photosynthesis there are the major factors, light, co2 and heat. You need to dial in and work out the weak points to find upping which will help the most. If you're running 1000w hps, 1500ppm co2 and temps at 72f raising the temp may help. It's all about getting it dialed in. Sealing your room is really the only good way to make sure your plants are able to take advantage of the extra co2, or you're just leaking out all of the goodness and wasting your $. You shouldn't get too hung up on what pull, but focus on getting used to your grow area, lights, and strains. Once you're grows are consistent, start changing 1 thing like co2, see what happens and adjust something else the next grow. In a 2 foot by 2 foot area you can do pretty well 130grams should be doable.