My opinion is that it has to be substantially cheaper than ADA Aquasoil or most people will buy the Aquasoil. The whole point of mineralized top soil is to be a cheap DIY alternative to Aquasoil and some other substrates. As soon as you have to buy it, the advantages start to diminish. And, as I understand it, you need to cap the mineralized soil with something like SMS, pool filter sand, etc. So, you can't just add this to the tank then add the water.
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