ACF in a Planted Tank

[mpmistr]

I know this might sound like a really dumb question but are there any dangers setting up a planted tank (co2, ferts, ect) with ACF? Would any of that stuff pose any risk???

Maybe I need to be more specific, would using a substrate with nutrients such as pond soil be safe? I know pond soil probably has iron, copper, ect and I am worried it could poison the frogs..