Home-made Fertilisers

Hi all,

Has anyone had any experience of creating their own aquarium plant fertilisers, specifically root tabs? I've seen various videos about how to make your own but they're generally from the U.S and the fertiliser brands they use aren't available over here (or at least I haven't been able to find them!). I wouldn't want to pick any general plant fertiliser off the shelf for fear of it containing something lethal to the fish.

Similarly, does anyone have any recommendations for liquid fertilisers which aren't going to cost the earth (that may be a pun of sorts!).

Cheers

Thanks for the response Steve - will take a gander.