The local aquaponics enthusiasts seem to be moving to the duraskim liners. The pvc based liner i just fold it like i am wrapping a christmas present, it's not going to mold or shape.
I am moving away from wood and pond liner grow beds. Between humidity, termites and general age, even pressure treated lumber doesnt have a long life here. This is one of the reason i started doing ferrocement.
The two i already built are on the agenda to be emptied, lowered and filled with soil to grow soil based plants like onions and carrots in traditional raised grow bed style.
My first ferro fish tank and grow bed didnt turn out as aesthetically pleasing as I was hoping but i learned a lot and the next two should be a huge improvement. Barring a sledgehammer or act of God, I expect them to outlive me.
These arent up to date pictures but you get the idea.
