So elsewhere I was reading about the possible problems with surface tension in the resin and how heating it may be a way to lower the viscosity and hence the surface tension. How about simply adding something simple, like say an aquarium heater to the salt water storage tank? By heating the water you will raise the temp of the resin as well, and have a steady supply of fresh heat entering the system to keep temps stable. The heaters are limited in range, so that overheating should not be an issue.