Hi all, I'm new to forums, so be gentle with me. I am reestablishing my tank after a couple of years layoff. It has been running for two weeks without fish. I added quickstart a week and a half ago. All my numbers are fine. The water temp is hovering around 72 without a heater (mine blew in the power outage after Sandy). My questions are: 1. Can I start adding fish? 2. How many can I put in to begin with? 3. Should I get a heater right away or will the fish be fine for now? Thanks for all your help.