Picked up a ProStar 90 a few years ago, have had some up’s and down’s. One of the first problems I had with the tank was the plumbing. I was told it was standard when I purchased the tank initially quickly realized this was not the case after making some cuts to the supplied plumbing. I bought some fittings and was able to get it running. I plan to overhaul the plumbing shortly and make another attempt to clean up a few small leaks which seem to be creating some salt creep.