It's been a few weeks since I was able to get my hands in the tank with the new puppy and all. This year in all, I have been having some serious macro algae outbreaks in the DT. So monthly I would go in and remove the various macros and thin them down. Coralline grows on the glass and I have a little cyanno on the substrate. Chaeto is thick and healthy in the sump. Well, this time was different. I removed a lot (about 1/2 gallons worth) of macro algae from the DT and I am finding a lot of this dark green and slimy hair algae. I have never had this one before. It resembles hair algae in texture, is very dark green, but very difficult to remove, like a turn algae. The worst part is it seems to dissolve in your fingers if you squeeze to hard. It has started at the bottom and rear of the tank. I fault myself for this as I have gotten lax on changing out filter socks and cleaning the substrate (sand and rock). So my corrective action plan: No food for 3 days. I feed my tank heavy. LPS and gorgonia corals have graced me with great growth as a result. I provide about 40-ml of liquid food, which has about twice as much water as frozen food...so about 7 cubes of food per day equivalent. I feed 1-ml every 36 minutes 24/7, which feeds the fish by day and the coral by night. I will stop this for 3 days and then slowly ramp this back up, probably 1 ml per day. Lights out for 5 days. No lights at all in the DT. I am now running my refugium back at 24/7 to try and get the nutrients to migrate to the sump instead of binding up in the DT. Ambient sunlight may still be an issue. I may actually black the tank out with some tarp for 3 days next week if I don't like what I am seeing. Nitrates and Phosphates are 0.0. A common theme so I am not surprised. I decided not to change out the GFO right now as I want the chaeto in my fuge to take care of this. But now that I have aggressively thinned out the DT, I will watch phosphates for any increase and will change out the GFO if needed. Skimmer on 24/7. I only run my skimmer for 6 hours a day. I have temporarily switched to 24/7. My tank has a ton of micro-fauna so I will go back to part-time once I get the feedings going again. Substrate replacement. Self explanatory. My tank is going on 3 years this summer. Back in the old days, we used to call this Old Tank Syndrome. These days, I don't know too many people who keep a tank that long anymore. I will do this over the next few months and will slowly remove and replace substrate in the main tank as well as the Miracle Mud in the refugium. I may do a 1/3 each month or something. Rock blasting. As a regular chore, I run a power head over my rocks to blow loose any detritus. I may hook up a Mag 7 to some tubing and give everything a really good blast from hell. The maxijet cleans the surface, but just does not get into the pores. Last but no least is get back to changing those socks! Not my proudest photo: Note all my corals are closed up because I just finished cleaning. This was around 6 pm and normally everyone would be fully extended about this time. Note all the algae parts floating in the water column. I changed out the filter socks to capture all of this. I will provide a weekly update so we can watch how this progresses (or crashes lol). I also have 3 coral frags to remount currently in the sand and four large calaustrea heads I may sell once I get this cleaned up.