Just wanted to say hi and introduce myself. I am starting a new reef with a FOWLR 20 gallon high tank that I got from an acquaintance two weeks ago. The tank has a 4" clownfish that is black and white but has orange fins and nose (no idea what species), and a 3.5" three stripe damsel. The tank, when I got it, had not been cleaned, or the water changed, in 4 years. It is full of microalgae, and has been difficult to clean. I ran a test kit when I got the tank, and the pH is 6.4, the ammonia and nitrite are zero, but the nitrates are over 160ppm, even after four 50% water changes. The test tube goes dark red immediately, and I'm surprised the fish are alive. I replaced the gravel substrate with a DSB, and removed the undergravel filter. I also added a powerhead for circulation. I ordered some chaeto and a clean up crew, and will make a HOB refugium from an old biowheel filter. I also have ordered an AquaticLife Mini Skimmer 115. I have also ordered a Workhorse 5 ballast and two 36watt 50/50 PC bulbs and will make a canopy for it. In the past two weeks, I have raised the pH to 7.4, but the nitrates are still steady at 160ppm+. Do you think I should just do daily water changes until it decreases? Is there anything essential I am forgetting? I've had all sorts of pets in the past, and cichlids, but never a reef tank. Thanks for your help, and I'm happy to be a part of reefcentral. I've attached a pic, but the water is quite foggy, so it is hard to see.