ADA AS mush can be deep vacuumed and whatever is not siphoned off, the larger grains and fines will remain.
Any clay like chunck,s mud balls etc, those are removed by hand. Like the new bags of soil, the grains should fall between your fingers without sticking or clumping. Anything else? Toss it out.
I have a new bag of it looks like 3 different Mr Aqua plant soil products from Seven Seas, there are a few distributors like Marine depot. I spoke with John and they have a fair amount of products from them and the VIV glassware, the Mr Aqua 120 cm tanks are really cool. Not sure about the retail places selling them, but they should be able to tell folks where to get it.
My assessment is not based on sales etc, I can get ADA locally and have gotten a lot over the years. No issues with that. But if the product performs better, has less baloney on the bag about miracles, looks better, better grain size, made less mess when redoing a tank while leaving the sediment in the tank, I am game.
No, I am not/do not sell sediments.
I never have nor ever will.
As far as inert sediment,s Black Flourite sand is still my favorite for a commercial brand. I wish they have the same thing in white and then a slight off tan white color. Some of the clay based products like Mr Aqua and the ADA have multiple colors you can buy I recall seeing in Asia and in Australia. But more the tacky colors, less of the natural colors.
Mostly I want new stuff and products that have some of the traits of the ADA AS, but not the mess. If it had higher density, the Mr Aqua soils would be prefect. Right grain size. Right color, seems to hold up better than ADA AS.
I need to do a plant growth test, but it's coming on fall here and cooler weather. 8 weeks it'll be Dec and not much light and fairly cool, so I'm not so sure outdoor or greenhouse growth studies will do.