On Fri, 13 May 2005 12:39:38 +0000, caren wrote:

Dose anyone make their own or know of any instructions how to?

TIA



Thanks for the replies guys however I haven't made myself clear. I was
enquiring about under gravel "fertiliser" and I misspelt the original
post, my apologies. I was thinking about a clay ball with fertiliser
incorporated within to feed plants through the roots.

I was wondering whether anyone was doing this successfully and had any
recipes to share?

I like the designs for the filters next time I break down a tank I will
atempt to build one.

TIA