DIY root tabs
 

Is there a way to do them? I dont think any places sell them, then again I hav'nt looked very hard.
I would just rather do them myself. Would you like ball fish food up and it by the roots and when it decays the plants get nutrients? Or is it a *bit* more complex then that?

Here have a read on this thread it will give some ideas. http://www.tropicalfishkeeping.com/a...ilizers-89248/

I will recommend you pottery clay-based which available at ceramic provide shops for about $20 for 20 Kg. You could also use powder clay-based and mix it with water.