So my triple tank has been running for about 3 weeks, I cycled it by adding filter media from my established tank which has perfect water parameters. However I have a bacterial bloom problem on the wood in the middle chamber, I have pieces of wood in al three but its just the middle one that has the problem. I have added Pure Aquarium balls to the filter, I have also taken the wood out and soaked it in boiling water, water changes etc but it just keeps coming back. Any ideas on why its happening or how to get rid?