As the title says... which one? It's a 100gal tank, so a big expense and I want to get it right. I know Aquasoil is better... but I don't want to deal with the ammonia issue. I'm moving house in a couple of weeks (for the last time hopefully!) and I have a 100gal fully stocked with fish. They'll be living in my old rio 180 while the big tank is moved/rescaped, which isn't ideal, so I want them in there for as little time as possible. There's a big price difference between the two substrates... What do people think?