AS + PS, you dose mainly K+, Traces
AS+ EI you dose the EI.
If you uproot AS+PAS, you will see for yourselves
You can avoid uprooting PS a few ways: never uproot, only top plants.
Do not move plants. etc
Or you can place steel mesh screen between the PS and the AS.
PITA and not needed if you use EI anyway.
The entire notion behind it prodividing more aertation to the root zone is bogus marketing hype and has zero foundation/support.
How do you cap the PS with layers of increasignly fine AS and expect the O2 from above to get down there?
Once the roots grow in there this is a non issue!!!
So whether you have AS or PS, it does not matter, after a day or so, there's hardly any O2 down there as it is.
I have a DO meter and pushed the probe down there slowly and let it sit for awhile. the same is true for plain AS at similar depths.
This notion of PS providing O2 due to size gradations is poppycock.
While one of the basic ideas of Power Sand is to improve water flow through the substrate, I'll agree that another concept is for the pumice to also act as a biological media to increase beneficial bacteria growth in the substrate.
Many have grown plants successfully in Aqua Soil with out Power Sand.
Do the plants grow any less? Not as well? I don't know and I can't say. Does that mean Power Sand doesn't provide the results suggested? Hard to prove either way.
I found better growth rates using EI+ AS vs AS+PS and ADA ferts.
PS does provide results if you lack the ability or desire to dose the
KNO3/KH2PO4 as well as the K+ and traces(you still need to dose the K+/trace either way, so this is less of an issue ain't it?)
what I'd like to know is if the sand heavy enough to remain unmixed from the aquasoil so when the layers of substrate are disturbed
Try it and find out.
Go ahead. I could use another person to prove my point.
The issue I find with new products is that many buy into the entire line.
Some things are worthwhile and useful and can be recommended by most.
Some have less use and are not quite what the developer designed.
Heating cables for example was another bad idea that did not follow the design's intent in theory nor practice.
PS has more place in the hobby than that certainly, but it's certainly not a must have component that is going to yield the same type of results as the ADA aqua soil. That much is painfully clear.
While I have no interest in ADA, I do fully support the use of AS and their glass ware, Tanks, etc. Some stuff is marketing garbage, but this is true of any company.
It's when folks come in and make claims based on belief rather than test, logic and falsification/verification that irritates me and incurs my full wrath.
It does take time to test things, then such products are better understood.
I view claims with skepticism, any hypothesis for that matter, I try and falsify it. If I cannot then it stands as tenetative working hypothesis until, proven otherwise.
Just because I test and am trying to disprove something does in no way suggest I dislike the company, or any other agenda. You'll note the things that do work I heap priase upon because such products do work well and help this hobby/worth the $ you spend on them.
It pisses me off when folks do not make this distinction when whining, crying and bemoan what a mean guy I am poo pooing their favorite product.
I try and understand and figure things out, if you accept mental blindness and belief based in your apporoaches to things that are testable, you are not going to learn anything about the world around you. You may learn from others that do such testing and see if it makes sense or not as well.
I do not operate on faith that way.
I question things and claims.
We all should, you have a brain, it works, you can use it.
That's how we learn. Anyone on these boards is here to learn.