Anybody out there have any experience with this one? I have it in a tank with 4 watts/gallon, Onyx substrate, and canister carbon at about 30mg/l. I've tried root tabs and liquid fertilizer high in chelated iron, but this damn stuff still turns brown on me. I have r. macranda which does well and r. indica literally grows out of the tank faster than I can trim it, so most of my conditions must be OK. The wallichii was really bright, orange/pink when I got it--almost looked like something you'd see in the ocean. Now it looks like a dead squirrel's tail! Too much light, maybe?