Just a quick update video on my UK coldwater marine aquarium. Many things have changed and the fish have grown much larger! Sea scorpions, goldsinny wrasse, rockling, lemon sole, goby, blenny, crab.
I was using a 600lh protein skimmer and an Aqua Flow XL internal filter. The fish were thriving and I had to release the rockling and a wrasse as they got too big. Unfortunately the following summer saw temperatures of 30c in my area and I lost many fish. I made a new setup with a bigger tank and added a water chiller that kept the water much cooler.