Can you put Amazonia over regular sand?

[Yoemen]

I have seen some tanks using amazonia recently and really liked how they looked. I have a 2.5" bed of sand in my tank right now. Can you put a layer of Amazonia over the sand? I don't want to completely replace it due to the expense involved, but would this work?


How much Amazonia would I need?

 

[Sorab]

Only problem with that is that ADA amazonia releases ammonia for about three weeks so adding it to a tank with fish would be a problem. Amazonia is usually used on its own but I dont see a problem with it on top of the sand.