The only reason i did single site, is because i couldnt find suitable fittings for rdwc.. and i was impatient when the seeds arrived... id never heard of waterfalls either.
The only fittings i can find are to suit 16mm hose pipe.. thatd work for waterfalls,
But the recirculation at the bottom of the drums i figure itd be too small..??
But if its all connected back up to a separate res... surely id only need to pump out water for the waterfalls at the top, and itd return back to the reservoir at the bottom anyway?...
Bear with ne .. i will get my head round all this at some point lol