Vern said, (In an earlier thread) If you look at some hydroponics stores you might be able to get one that reads conductivity also.Monitors are fairly expensive,but when you need to know the exact ph they cant be beat. Someone please enlighten me. I know that conductivity is, Its the measurement of waters ability to conduct electricity this will go up and down as salts (of about any type) is added or subtracted from the water. So while I have a basic understanding of what it is, I just need someone to explain the significance of this parameter, and what the effects on apisto's are. Also how would one go about manipulating/maintaining it? Thanks in advance Erick Jones ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!