Hi, I just came across this thread while searching " Hypertufa ponds". I'm in the midst of a project right now and I'm getting more and more skeptical on the integrity of the material. First off, I used a thick plastic pond liner from Home Depot as my mold for the project. I wanted to make it as big as I could so I lined the outside of it with chicken wire and made a tufa recipe of 1:1:1:1 cement, play sand, peat, perlite. That was applied about 2-3inches thick and I let it cure a couple days. I wanted a smoother look for the outside so I then added a 1:1:1 cement, play sand, peat (finely sifted) about an inch all the way around. All of this was done while it was upside down. After a couple days I flipped it over and removed the mold. I have kept it covered in plastic and mist it daily. It has been a week. Any suggestions on what to do from here? I plan on putting water plants in it and a water feature. Hypertufa appealed to me because it is going on my balcony and wanted to reduce weight. The inside right now has many air-pocket holes but nothing too big. I read some stuff about cement slurry. Should I coat the inside with that to fill holes and make water tight? And is it about time to just take the plastic off and let it start curing in the outside elements? I live in Florida where it's pretty humid so I don't know if the outside humidity will still allow the cement to cure while uncovered. Appreciate any feedback or tips. THANK YOUUUUU!!!!