Good Questions, Im no expert with ADA but my initial experience is that its very messy and yes it does break down easy so long term durability is questionable. If you squeeze a grain in betwen your fingers, it just breaks down into grains.
Im sure its an awesome substrate but I believe ADA came out with this to avoid having substrate scratching there tanks. It does excel in that area where its not sharp at all.
I used Eco complete and then topped that with a 1inch layer of ADA, but its making a muddy mess that Im dealing with. Im battling a decision whether to leave it or not but I do love Eco Complete and I dont think you can go wrong using a proven substrate!
Yeah I would also want a substrate that lasts longer especially since ADA aquasoil is so expensive!
Yeah I have used eco complete before and thought that it was a pretty good substrate. It was really easy to use...I just dumped it into my tank and the water cleared out very quickly.