<a href=showthread.php?s=&postid=9797509#post9797509 target=_blank>Originally posted</a> by sarai826
Without knowing your tank's chemistry, it's hard to say. As several have already noted, your tank is very young to have an anemone in it... one of benefits of age being the stability which is SO vital to anemone health. Also, remember that you have a 12 gallon tank... which is a relatively small (and thus less stable/more easily influenced) volume of water.
That said: What are your parameters? Let me encourage you to purchase a *good* test kit, as soon as possible. I know it's hard to hear, but you do have a couple of strikes against you on this one... a good test kit, with frequent testings (keep a log. Start now. Seriously.) are going to be vital to keeping your anemone healthy at this point. You're also going to want to do frequent, but very small, water changes.
Try not to get upset when people give advice you disagree with, and tell us about your tank. Do you have pictures? What were your parameters when you added the anemone v. now?