| Re: Yellowing, curling leaves
It's very hot for the plant at the temperature range you posted. You would need a lot of CO2 supplimentation for the plant to respond to an environment that hot.
You need to do two things- the most important thing being getting an occilating fan blowing on the plant during the light cycle. Make sure the plant is moving a bit in the wind.
The second thing you need to do is focus on getting the temperture under control (75-80) or get a CO2 tank. Still then, you won't want the temperature getting over 85.
75-80 is optimal temperature without co2, but with co2 you can have a temperature of 78-85 degrees. You need to have a fan cooling off the leaves with wind though. That is the most important part when you are controlling the temperature if you want the plant to be problem-free.
Your water source should be fine. I think your plant cannot uptake nutrients because of the heat and the amount of light it is getting. You may want to go 18/6 to give it a break, although if you can get the temperature under control 24 hours of light is the best I've used for growth.
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