Many folks here including myself order from here:
As far as disrupting the substrate, are you referring to inserting fertilizer into it? If yes, you don't need to do that with AS in the vast amount of setups. Just dose the water column.
Wait, so if aquasoil should do fine and all I'd need to do is dose the water column, could i do that with the dry fertilizer? is that what you're saying? lol or should I get something liquid? And I was looking on marinedepot.com's selection of seachem's fertilizers and stuff and they weren't expensive... they were like $4-12 for bottles of things, not like $20 for brighty k on ada's website for example.