I had scanned a drawing that I did of my setup .... the image quality is somewhat lost in the pdf to jpeg conversion. But you can see what it looks like ...

Yash booj - sorry I don't mean to hijack your thread said:might[/I] help with what you might be considering doing as well.
Cheers!
Yash
fishieness said:that pH will not hurt anything as long as it s constant. but still, you should check your other levels that affect pH such as Mh, Ca, and ALK. what brand of salt are you using?
pH does tend to be low when there is a high amonia rateing so i wouldnt worry about it at all. but i ask you to test just to be able to elliminate these things down the line as well as get you to get a better salt if you are using a crappy one. good luck