Stltoed
Well-Known Member
Hello again. I'm sorta like Haleys Comet. I come by every so often to find answers then fade out to return later. Well, I'm back and looking for answers with CO2.
I have 2 King Tut plants from Pyramid Seeds. I've grown this strain before but it was in soil.


I'm trying it again in a max effort grow in hydro with gas. I just think I can do better. This is my second grow with gas. Last season was a 18oz plant in hydro and a 12 oz in soil. Pretty cool, but im sure I'm missing some trick of the gas trade. I'm here to talk to those that use gas successfully and pick a brain or two.
My room is in a shed in Southern California. It's heavily insulated with AC, a dehumidifier. I have a 2x2 closet that I grow with heavily composted soil. I usually grow the same strain as the plants in hydro but not today. The strain this season is Dark Phoenix by Greenhouse Seeds. A new strain, but kind of a problem child. Terribly misshapen seedlings, wrinkled as if I grew them in a glove compartment of an old car. But, of the 2 seeds started I got 1 that outgrew most of its issues.
I'm using ChilLED lights in both areas. Over the hydro are 2 500watt fixtures from their Growcraft series and a smaller one in the closet. The shed is set up for bringing air in from the outdoors and removed out with a 8 inch fan in the roof. But I won't be doing this since I'm using gas. Well at least till deep flower
I have an 8 burner CO2 generator... too large for this space, but I bought it for a later configuration of the shed that will double the grow area. I use a repeat timer to turn the generator on and off... no fuzzy logic bad ass controller here. I use a Titan meter to show the gas in PPMs. The gas turns on for a little less than a minute and shuts off for 20. Not a very sophisticated rig but it works ok.
My RDWC system is a repurposed GH aeroponics system (there are actually 2) used as deep water. Including the res. it's about 50 gallons laid out in 2 pots that can grow as many as 14 plants each, but there will only be 2 this season. I cool my water with a fan, no chiller... I can go into that further if you have a RDWC rig but don't want to buy a chiller. My fan will cool the water by more than 20 degrees if the humidity is low. Water comes in by float valve directly from a 300 gallon RO filter.
So that's the bones of this story. I've been growing (on a forum) for about 5 years. Pretty comfortable with growing in general, but I really want to learn all about CO2. I'm looking for a gas growing Jedi to hold my hand a bit.
Questions:
When do you stop using gas in flower?
What PPM numbers do you grow to, and do you change them over the life of the plant?
What temps, humidity, nutrient level ( if you're growing in hydro) and light output in PPFD do you use?
What's the deal with Calcium? I gotta mainline that shit into my plants to get it to work.
Last season I basically had 2 plants. One in soil the other in hydro. Both did very well


While the soil plant did really well, it didn't share the rock hard bud quality with the hydro plant. The buds were very large, but loose. This plant was revegged so it was it's second harvest. The first season the buds were much smaller, but much denser than the second... what do you think happened here? Was it a CO2 thing?
Anyway. I hope this thread finds the right people. I know I'm in the right forum for questions as long as everyone can keep their cool haha. Thanks!
I have 2 King Tut plants from Pyramid Seeds. I've grown this strain before but it was in soil.



My room is in a shed in Southern California. It's heavily insulated with AC, a dehumidifier. I have a 2x2 closet that I grow with heavily composted soil. I usually grow the same strain as the plants in hydro but not today. The strain this season is Dark Phoenix by Greenhouse Seeds. A new strain, but kind of a problem child. Terribly misshapen seedlings, wrinkled as if I grew them in a glove compartment of an old car. But, of the 2 seeds started I got 1 that outgrew most of its issues.
I'm using ChilLED lights in both areas. Over the hydro are 2 500watt fixtures from their Growcraft series and a smaller one in the closet. The shed is set up for bringing air in from the outdoors and removed out with a 8 inch fan in the roof. But I won't be doing this since I'm using gas. Well at least till deep flower
I have an 8 burner CO2 generator... too large for this space, but I bought it for a later configuration of the shed that will double the grow area. I use a repeat timer to turn the generator on and off... no fuzzy logic bad ass controller here. I use a Titan meter to show the gas in PPMs. The gas turns on for a little less than a minute and shuts off for 20. Not a very sophisticated rig but it works ok.
My RDWC system is a repurposed GH aeroponics system (there are actually 2) used as deep water. Including the res. it's about 50 gallons laid out in 2 pots that can grow as many as 14 plants each, but there will only be 2 this season. I cool my water with a fan, no chiller... I can go into that further if you have a RDWC rig but don't want to buy a chiller. My fan will cool the water by more than 20 degrees if the humidity is low. Water comes in by float valve directly from a 300 gallon RO filter.
So that's the bones of this story. I've been growing (on a forum) for about 5 years. Pretty comfortable with growing in general, but I really want to learn all about CO2. I'm looking for a gas growing Jedi to hold my hand a bit.
Questions:
When do you stop using gas in flower?
What PPM numbers do you grow to, and do you change them over the life of the plant?
What temps, humidity, nutrient level ( if you're growing in hydro) and light output in PPFD do you use?
What's the deal with Calcium? I gotta mainline that shit into my plants to get it to work.
Last season I basically had 2 plants. One in soil the other in hydro. Both did very well


While the soil plant did really well, it didn't share the rock hard bud quality with the hydro plant. The buds were very large, but loose. This plant was revegged so it was it's second harvest. The first season the buds were much smaller, but much denser than the second... what do you think happened here? Was it a CO2 thing?
Anyway. I hope this thread finds the right people. I know I'm in the right forum for questions as long as everyone can keep their cool haha. Thanks!