Hello All, With the recent talk about the Hanna TDS meters, I went and got one also. I was very surprised that my water was over 500 tds, but only 76 ppm GH. So what number do you actually use for breeding? What's funny is that my RO water is also fairly high in TDS but not in ppm. Confused to say the least. Any ideas? Thanks, Bailin _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. ------------------------------------------------------------------------- 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"!