Thanks guys! That helped, atleast now I have somewhere to start from when I try digging depper into this. When I first startet out with plantet tanks, all the chemistry and technical equipment just pissed me off, I wantet to work with layout's, I didn't want to stress with learning about PO4, KNO3, MGSO4, lux, lumen, RA index, laterit, clay, peat and lordy lord how ever much else there was... But, lately I have been really digging into this, and man does it show on my tank! For one thing, very singel species of plant I have but into my thank has been growing like crazy! Even to such a rate that just from selling out my trimmings, I have made enough money to buy myself a PH controller and UV-filtering device. And the worst part of all this... It's actually fun!
I enjoy reading all your various post, and hope to contribute more in the future!