Hi,
If I am not wrong, there is no need to pre-wash the ADA aquasoil. It is not supposed to be washed as well, cos you will end up with brown water and little soil (if disintegrated) for planting. ADA aquasoil is soil with ferts in them, so just 'plug and plant'.
We normally wash gravel, sand.. etc.. but have to differentiate whether these gravel/ sand will still need base ferts to kick start a planted tank though.
I'm not too sure about Aquabasis though. It sounds like JBL base ferts to me.
Maybe others can help you on this.
Cheers!
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