Thanks
@Grim Reefer! The big one is really taking to the skies. Very different to the smaller ones. I think it's because the smaller ones started out under my T5 light, which makes them a lot bushier. I noticed the curly edged leaves too, but don't think its the heat. Daytime is max 25°C and night time is no less than 19°C. It think it's due to to 5W LED light, and I was planning on raising the flowering plant so I can raise the light too. It seems only the plants under the 5W LED have this issue. It feels strange to have the light so high above the plants though. Then again, I'm a total noob when it comes to 5W LEDs