Just picked up a 35 gallon FOWLR
tank from a friend who no longer wanted it. This is my first salt tank so I'm not sure of a few things. When I set up I only transported 1/2 the old water which tested really high: ammonia, nitrates, phosphates etc. After topping off with new water and extra filtration, levels are normal. Problem is I found some copper based fish treatment and I plan to grow inverts, corals etc. One guy at the LFS
said to throw out all LR
and sand as will always release copper. Another said to get rid of sand and get a copper removal filter. I did the later and copper tests at trace levels, but not zero. First question is: when can I put new sand in? Im told the sand can absorb the copper and should remove copper before adding sand. Also, there are a few really nice rock/coral pieces that have died, but I want to add to tank. Will they absorb bacteria and turn back into "live" rock over time? Thanks in advance for any advice.