Use activated Carbon as well if your not already, that is supposed to help. Since you are in New Braunfels I purchased a carbon reactor the other day that I should be getting in the next few days (Either Saturday or Monday). It can be a HOB or in sump placement. If you'd like to borrow it when I get it in, let me know and you are welcome to use it for a while to see if it would help. I also have one of those siphons you attach to a sink that your more then welcome to borrow, as siphoning out as much as you can is always a good idea.

Shoot me a PM if you need anything.