Join Date: Apr 2003
Location: Mid-Hudson Valley, New York
The trick is the slow release. A piece of Jobe's stick in the filter is either going to be too large to be safe or too small to last long. And if urea is an ingredient, then Hello Green Water. So a binder substance is the key- something to create the proper slow release. Tom Barr stated that he is working on this for a substrate amendment, but as far as I know, has not found a binder. The buffer for that is the gravel cap. I don't have to say how critical the release rate would be for something constantly immersed in fast-moving solvent (water).
I've got my hands full experimenting with substrates right now. Why don't you set up a little 10g and give it a whirl, Gareth? We're behind ya, bro! :lol: