Every time I start to relax thinking, finally everything is going well another issue seems to crop up. My latest is this green material pictured. I saw it for the first time yesterday, thought I got rid of it and now more today. I have also included an overall picture of the tank, since there me be other problem areas some of th emote experienced (everyone!0, can point out. The tank is about six months old, but the rock etc was moved from a smaller tank that I had for about a year prior to that. Everything seems to be thriving except for my latest soft coral, which may be dead, but my wife thinks they still might come back. It is always difficult to get an exact read on chemicals in the tank due to color chart interpretation, but these are are close Nitrates are at 0-5.0 Nitrite-0 Ammonia-0 High PH- 8.2-8.4. I have not checked anything else since this is what my kit contains.