Anemones Hide or Gone

I have 90 gallon tank with about 120 live rock, only 6 weeks old reading have all been right on till today, ammonia 5 ppm, nitrates 180, nitrites top end two, ph 8.5, iron high; today I feed 3 times so may have caused this my self, question is have purchased 4 different bubble type anemones over past weeks and only have the 2nd one still visible, the one that is seen is on front piece of live rock and never moves and has two different clowns that visit separately, so the ones that are no longer seen, upon release they immediately proceed to hide in back or in live rock somewhere and never surface again like they are hiding, to my knowledge they have never confronted each other just hide die or go out the overflow. What's going on here am I only entitled to one, doing something wrong help me out. This is first salt tank. No other losses of livestock excluding the snails and crabs the file fish kills. By the way, the high values are from a regular test kit, if I test with the multiple test strip all are normal. Lot going here!