I just got another 90 gal. tank up and running. I was letting it cycle. I had it going for aprox. 10 days. I used a wet/dry of one of my other tanks that has been going for 2 years. Everything looked ok so I started to add fish. I put an oscar and a jack dempsey in it. They have been in it for a few days with no problems. My problem is my yunger brother thought he was helping me out and put a few pieces of driftwood and a few rocks that he found outside in the tank, without boiling them in water. What should I do?????????? The fish seem to be ok. I have a 1400gph pump circulating the water through the wet/dry. Should I remove the fish and start over, or should I just keep an eye on them. I dont know what to do...... The tank looks crytal clear. He said he washed them off first, but he didnt know he should of boiled them in water. PLEASE HELP Should I add carbon in a media bag and put it into the wet/dry??????