Thanks for all of the replies...
My fish load currently stands at 4 swordtails, 2 platy and 2 Cory. Plants; 2 java fern, 1 anubius nana, 3 valisneria, 2 Cryptocryne sp and the beginnings of a lilaeopsis "carpet". All of these should require the lower end of the light spectrum and have 2wpg from my set up. I don't want to go into the realms of co2, wether it's DIY or not, I don't think it's necessary in my 25 gal..
The plants have been in a little while and I'm looking at giving them optimal conditions really..
After the advice in here from you knowledgable people, I'll be leaving my carbon in for added surface area for bacteria.
Any other advice in ferts etc would be great