I have no clue yet...I don't even know if it will work on the GW or not. This weekend I plan on taking down the 10g tank in the pic and setting it and the one Jim brought me up so I can run the experiment again with a control tank.
The first experiment didn't work so well, but I'm thinking with the potting soil/play sand substrate (it was an emmersed setup) this tanks has that it may be leaching NH4 as fast as the ASA can kill it.
All experimental at this point! If anyone want to bring some various types of algae to the meeting next weekend, we can put a little of everything in there and see what happens!