As far as ADA Aquasoil goes, this is generally true, but you should be aware of a couple of things if you go route. Although, I have not seen this in my experimental high light DIY c02 15 gallon high tank, many have experienced months of ammonia spikes using ADA Aquasoil. That could be an issue or not depending on what critters you keep and their sensitivity to elevated ammonia, not to mention your PH and tank temperature. Ammonia is alleged to be more toxic at higher PH and higher tank temperatures.
Also, I am not quite sure how well ADA AS low tech, no c02(excel tank) would work. If the substrate releases a lot of ammonia over time, fast growing plants in a high light, pressurized or DIY c02 tank may be able to absorb it before it becomes a problem. I am not sure how well or quickly tanks would absorb excess ammonia in a low tech tank. But again if your temperature and ph is on the lower side, it may be a non-issue. I wanted to experiment with a low tech ADA Aquasoil based tank to find the answer for myself, but space restrictions made it difficult for me to set up another tank.
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