3D House Printer
Talk about printing septic tanks or aquaponic troughs in situ for our next aquaponic workshop:) If the print is thin, then we can get a decent cost. Say for 2" thick walls for a 3x4x26 foot pond like ours, that is still 2 cubic yards of concrete - but not really concrete but concrete with smaller aggregate - minimum of $200 dollars delivered. Not bad, if you don't do the labor. But without rebar, it will crack - so special mixes are desired.
Explains different ways to do this.