Green and healthy, invented an candle can that air intake hoses run to that allow me to burn unscented 15hr candles in to increase CO2 (I do not recommend doing this for the Fire Hazard it creates). Basically a 1.5-foot tall by 1.5-foot-wide aluminum can with holes drilled in to the sides of it for air flow. Inside the can is a candle lantern to protect the flame from drafts created by the intake hose and holes. I also put 2 inches of water in the base incase somehow it falls over or something. I place it on concrete floor away from anything. Only the intake hose is connected to it, and it pulls air through the drilled holes and sucks up the CO2 generated by the candles into the tent a few feet away. The size of the can and the internal lantern negate the heat it generates along with air flow. By burning 2 candles I get my CO2 up to 1200-1500ppm. I do not have a closed system, but it provides constant CO2 on the cheap. Burn 2 candles a day and purchased 288 candles for 100 bucks. Thats 144 days of CO2. Water the plant with honey water (48hrs aerated tap water to vaporize chlorine out and add 1 Tbsp of honey per Gal) to feed the microbes with Carbohydrates. Spray with Wollastonite (1/4 cup per Gal) to give Calcium and Silicon on the Cheap. 6 bucks gets enough to last you years for small grows. Miracle Gro Potting Mix has N-P-K and should maintain a PH 5.5-6.2 throughout the plant's life. I am worried about its nitrogen levels during Flowering. Its slow-release formula may be too much for flowering stage. Plan to dampen it with saw dust to leech Nitrogen out of the soil if I see Nitrogen burn. During this week her cotyledon leaves died so I cut them off. Increased lighting to 800PPFD due to CO2 increase. Watered 1/4-Gal exterior twice and sprayed Wollastonite foliage and surface soil twice. I use the knuckle check to know when to water and the plant of course. By end of week she is a thirsting and drinking fast. The picture shows a little droop but thats what she does just before the lights go out.