Its LECA its neutral and I dont see anything other than thats a really big bag of it
..I use the HydroBalls at PetSmart..its LECA too but called HYDROBALLS...they can call it anything they want its the same thing...the biggest difference I see is the stuff I use isnt very pretty or uniform in color..The HYDROTON I've seen being used is all very pretty to look at but it does the same thing...So if you need PRETTY for top dressing it might not be very pretty uniform in color or sizes