New pond (concrete???)

I recently moved into a house that had a pond. The pond was just a pile of dirt and a shotty liner that leaked slowly. The fish were infected with all sorts of diseases and parasites. The fish died shortly after I moved in, so I decided to improve the look of the pond. I built walls all the way around the pile of dirt. Leveled out the dirt. I first tried to patch the liner, but that did not work. It was leaking around the seam from the two pieces of liner. So, I went to the local home improvment center and bought a preformed (plastic liner). It was the biggest one they had in stock and the deepest. Got home and placed it where I thought it should go, and it was just too small for the area I had. So I bought another one. I placed them side by side and it filled the space nicely. So I have just started landscaping around it and bought some cheap feeder goldfish to put in there, but I am really not happy with the 2 separate ponds. I was talking with someone at the hardware store and they said they are building one and using concrete.

Does anyone have any sites, information, or how to for this type of pond.

What type of concrete? What type of paint and sealant? Prep work for fish/plants after concrete has set? Everything I have seen is mostly liner type ponds, but I want this to be the final work. I have worked 8 months on this off and on.

I can post pics of pond in progress, but how do you do it on this site? Is it html ( [img] )?