My husband and I just got a 55 gallon tank and we decided to go with saltwater. We've had it for about 7 weeks now and for some reason some of the fishes that we bought which were more of the expensive ones died first. We used to have a bicolor angelfish (died this week), longfin bannerfish (died 3 weeks ago), pacific
blue tang (died this morning) and one of those boxfish (died 5 weeks ago). We've had a
test kit to check on the water chemistry and in the beginning the
pH was a little low, the
ammonia,
nitrite and
nitrate was fine, but recently the ph has been still low, the ammonia, nitrite and nitrate have been really high. We already bought those solutions to rise the ph and the eleminate the ammonia, nitrite and nitrate and my husbands been doing a partial
water change and also changed the filter and nothing seems to work. I would keep on doing the test, but no improvement. Not sure what else it could be. Could someone please tell me what could be wrong? Does someone think it could be that we didn't have any live rocks at the time because we just got some live rocks this morning. So now the only fish that we have are the blue damselfish, blue
green chromis, 2 of the ocellaris clownfish, the sandsifting starfish, 4 large snails, 9 tiny snails and 1 hermet crab. I also noticed that our tank has those red marks on them is that normal? Please tell me what we are doing wrong and what we need to fix them. Thanks a lot!