I am looking to create a trough-like basin for two water features I want to place in my yard. I don't consider this to be in the landscaping/gardening department since I am working with concrete. My overall dimensions will be approximately 3ft wide and long by about 14" in height. Inside in the center of the trough I'm going to place a water pump so that a spring will shoot up about ten to twelve inches into the air to create that relaxing sound of splashing water. This will be a modern austere look/style.
In the link above the author of that DIY article states this could be used for a pond or aquarium. But then in the Q&A at the bottom he sort of contradicts himself by responding to someone who is asking to make a pond. Well, the contributor is asking to make a very large version on this. Devin Biggs, the author of the online article, responds back by expressing doubt that an 8ft long by 3ft wide version of a foam core concrete basin would hold up to the constant pressure of the weight of the water inside.
This makes me sort of doubtful that even my small dimensions would hold up over time. But then again, I have no idea and have limited experience in working with concrete. Does anyone know if using pink insulation foam board to create concrete troughs will hold up over time? I live in the desert so it'll never freeze. So there is no issue in freezing with water expansion; causing stress on the structure. I like this idea because it will be lightweight and I'd be able to move this, if I so choose.
Otherwise, if making one in solid concrete with rebar and wire enforcements for strength and longevity is the way to go I'll stick with that.