Hello, thank you for responding. These are the parameters that I could get on my softest tank. This is the one with the rams. This tank has nine parts distilled water to one part tap. ph= 7.6 kh= 30 PPM gh= 60 PPM These are the parameters of my tap water right out of the tap. Ph= 7.6 kh 60 PPM gh=140 PPM. All of my tanks have a pH of 7.6 no matter what the mix is. I can't change it. Strangely enough, I have a pair of rams in straight tap and they lay eggs also but I never see fry or wigglers. It could be water or the rubber head pleco : ). I hope you can advise me. Surely I am not doomed to keep only the easy fish. Do you think an airhead can figure out to hook up and operate and RO unit? Christmas isn't far off you know. Thanks in advance Teresa. ------------------------------------------------------------------------- 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.