jonny_ftm said:Many thanks for clarifying all this
Just one question. ADA AS is mineralized N and P while earthworm castings is organic N and P that needs to be mineralized by bacteria for plants to take it
So, at the end, is it really important to add ADA AS to earthworm castings? Which one will last longer? I do think organic soil as it should better keep the nutrients in it and not leach them in water, or am I wrong?
No, ADA As is not mineralized.
That's why it leaches NH4 for a month or so, then the bacteria mineralize it by the end of 3-4 weeks.
I use either ADA As or WC, maybe delta soil. If I want less richness, I add more sand % ratio.
But with ADA AS, I add no sands etc, just straight.
Some tanks use just dolomite white sand for aesthetics, but given a choice, I tend to use both the water and the sediments for nutrients. WC,topsoil, delta soil, cat litters etc, all are more DIY approaches which are cheap. ADA AS is a brand and fairly consistent and needs no sand "cap". No "layering" which turns me off.
So I tend to suggest the ADA more.
However, even ADA suggest layering with Powersand under the AS, which defeats the advantage really.
I suppose it's a hold over from the old days when Amano sold and used PS, but it serves little function after a month or so. Even there, adding some KNO3 does the same type of thing.
Does not hurt, but when it comes up and pulls up, it looks tacky. Cost a bit more etc.
So I do not use it.
ADA AS has a lot of longer term nutrients.
Most are very happy with it.
But you can go the DIY routine, follow the WC article reprint I have on mysite.
Not hard really.