I bought this "flame" algae at a reef shop over 6 months ago. The tank is a 20 gallon long. Not sure if the ID is right as all these Gracilaria like algae's look similar to me. The tank is well established for over a year and I reduced the lighting on the chaeto to bring up the nitrates a bit to 20-30ppm, but it still wont grow. I think it has actually shrunken. I had more clumps before. The chaeto is growing well. I don't really dose anything but flake food. There are just some clowns and 5 RBTAs that I put in over a year ago when the tank was set up. The flame algae is under the same lighting as the RBTAs. They have grown some, but not alot. I haven't measure the PAR. I have an Apogee sensor on the way. Any advice to get this stuff growing would be great. The second picture is of some Ogo I bought from Algae barn around the same time. It has disintegrated completely since