I've noticed on this list that many people speak of using additives when using RO water. Is this necessary? I plan to get some type of Apistos as soon as I learn a little more about them, and get one of my other tanks cleaned out to put them in. If additives are necessary, what kind would you recommend? Also, I was wondering just how aggressive Apisto's usually are, (of course, as an average, since I don't know what kind I plan to get yet), can anyone rate them as opposed to the African Malawi Cichlids? If not, just a general idea will do. I just threw out the comparison to the Malawi's because that is the type of fish I have kept longest and am most familiar with. Hopefully they're not as bad as the Malawi's. I have a male Oblique that has beat up two females in the past week! Kind of rough to breed them when the females spend most of their time in a hospital tank. :( TIA, Sherry ------------------------------------------------------------------------- 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"!