ah right thanks for the info, the tall one and the red one i got from the lfs and they have had them for ages fully submerged in water, i will leave them and if they start to die i will replace them. as for the anubias the person at the place i got them said i can attach them to bogwood but didnt say that i had to, but i did want to do this any way once i got some wood, so i will definately do that now. what would i use to anchor them to the rocks?
ps i dont have a rabbit so i wasnt planning to use the method but i thought i would mention it to see what people thought, i did also think about possibility of contamination, he did say to dry them out for a long time, which i guess might help cut the chances of this down but your definately right that it would be far safer just to use normal fertilizers, plus i dont really want massive amazon swords as they would take over my tank. Are those two ones you said would rot like pond edging plants or something because im sure ive seen them around ponds before, guess they arent really designed to be fully submerged, guy at the shop never mentioned that but i guess he wouldnt would he....