I use a base of peat with a layer of onyx sand and laterite on top of that. Then a layer of SMS to achieve just under an 1"+ of a base (basic cheap filler). Then on top of that I use a 50/50 mix of SMS and EC. I mix in the EC to make the SMS a little more compact and easier to hold plants until they root.
I tried ADA soil once and wasn't impressed and was more t'd off about my water always having a yellowish tint I tore the tank down in less then three months and started over. Easy guess would be I'll never use it again.
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