Hiya Uncle, well the 3-10-3 should be fine i think but not for the first 2-3 weeks..Let them get established before starting the nutes, and then start with like 1/4 of what the bottle says to use just to ease them into it.. As far as when to water them you can check the soil 1 inch deep to see if the soil is dry or wet or moist. You really dont want the soil soaked but just moist so not to get root rot but if let dry out to much my theory is the roots will grow looking for water and maybe get root bound,just my theory as for the c02 you can use warm water with sugar and yeast in a plastic bottle to produce c02 and you can find lots of post on these forms and the web to research that with no problem. I hope this helps man and if anyone finds im wrong here please let us know..lmao.. anyways man good luck and in in this one till the end so keep us posted as to how ya doin there..