what are the signs of co2 poisioning im trying to grow in a garage and my plants keep dying. ive grown good shit before. the temperature is right never rising a bove 80. im using one of those grow tents and i think the hot water heater and the house heater are piosioning my plants. all the leaves on this mother i got went from green to yellow in aout three weeks they are drying up and have some wierd looking spots on them the mother is in a 6x6 rock wool cube. i took clones from it they are still living but leaves are dying and drying up i thing its a ventalation problem. im using fox farm soil i have the clones in plastic cups.
