Hi everyone, this is my first grow and after a few initial problems I thought everything was going well. However a few days ago the leaves started to curl and face upwards also their are some spots developing on the leaves.
I have attached some pictures for you to look at. In the first picture you can see how the leaves are curling and starting to face upwards. The next 2 pictures show the leaf damage. The spots marked "2" is old damaged caused by water droplets on the leaves and direct sunlight. This happened about a week ago when they were young. The spots marked "1" are what i'm worried about at the moment. They look brown in the picture but they look white under the lights, also the leaves seem to be yellowing and some of the tips look white under the light.
I know the stems are quite long this is because they were not put under the lamps straight away, they were just on the windowsill for the first week.
I have searched round the forums and I think the cause of the problem is heat stress but i'm not sure (could the spots be spider mites?). Any advice on this problem or my setup in general would be much appreciated.
About my setup:
The seeds germinated about 2 and a half weeks ago and were potted in small plastic cups. The plants were re-potted about a week ago into larger pots using a moist seed and cutting compost (Levington brand). Since re-potting they have been given roughly 10ml of water every couple of days or so. The plants are kept inside an upside down perspex fish tank with holes drilled in the top and an air gap around the bottom. I have used 2x 20w fluorescent energy saving bulbs to light them (picture below). The tank is covered with a reflector made of white paper (picture below). They were on a 24/0 light cycle which I changed yesterday to an 18/6. The room the plants are kept in is heated with an electric heater. The temperature and humidity inside the tank range from 26-30C (19-86F) and 49-65% humidity. I am not currently using any fans or means of air circulation other than removing the lid periodically.
I have attached some pictures for you to look at. In the first picture you can see how the leaves are curling and starting to face upwards. The next 2 pictures show the leaf damage. The spots marked "2" is old damaged caused by water droplets on the leaves and direct sunlight. This happened about a week ago when they were young. The spots marked "1" are what i'm worried about at the moment. They look brown in the picture but they look white under the lights, also the leaves seem to be yellowing and some of the tips look white under the light.
I know the stems are quite long this is because they were not put under the lamps straight away, they were just on the windowsill for the first week.
I have searched round the forums and I think the cause of the problem is heat stress but i'm not sure (could the spots be spider mites?). Any advice on this problem or my setup in general would be much appreciated.
About my setup:
The seeds germinated about 2 and a half weeks ago and were potted in small plastic cups. The plants were re-potted about a week ago into larger pots using a moist seed and cutting compost (Levington brand). Since re-potting they have been given roughly 10ml of water every couple of days or so. The plants are kept inside an upside down perspex fish tank with holes drilled in the top and an air gap around the bottom. I have used 2x 20w fluorescent energy saving bulbs to light them (picture below). The tank is covered with a reflector made of white paper (picture below). They were on a 24/0 light cycle which I changed yesterday to an 18/6. The room the plants are kept in is heated with an electric heater. The temperature and humidity inside the tank range from 26-30C (19-86F) and 49-65% humidity. I am not currently using any fans or means of air circulation other than removing the lid periodically.
