Ok thanks, I will take a read of that. As you can see I have added some moss balls and I love them. I was thinking of buying some TNC plugs and put one under each plant, what do you reckon? Do you think I have laid out the plants well in my tank. The light I am using is what came with the tank which is the 2x45 Watt T5 Juwel tubes. They state on their website they are good for 'excellent plant growth'