I Recently Purchased 8 Fish for My 120 Gal aquarium. I have had no fish for 2 years and only a couple of eels. I quarantined my new arrivals for 2 weeks. everyone did well and started to eat. After putting my new fish into the tank they have slowly started to die off one by one. I have now lost 5 fish total. There are no physical signs of ailments or disease. I have tested the water parameters and everything reads normal. .20 Nitrates, 0 Amon., 0 Nitrites, PH 8.2, Temp 80, Sal .23. All of my parameters have been stable with no sudden adjustments. All of the fish have been eating when fed every other day. There is plenty of water flow in the tank as well. I am at a lost. I do not understand what is going on. I now only have 1 lionfish and two angelfish left. All three of course look healthy and are eating. Any help would be great! I should mention my live rock does have a bit of algae, due to a high level of phosphates. Everything I have read indicates that Phosphates cannot kill fish. I am currently waiting on a new reactor since the old bag method is not cutting it.
I run my own RO and Mix my own Saltwater. No trace elements found in the RO. Allow my salt to sit for 24-48 hours before doing a 20% weekly water change.
I run my own RO and Mix my own Saltwater. No trace elements found in the RO. Allow my salt to sit for 24-48 hours before doing a 20% weekly water change.

