My Elegance slowly started to detiriorate. I think it has to do with some serious brown hair algea and ciano issue that i have. The algea is slowly being eliminated. I did a weekly 20% WC in the last 3 weeks. Parameters are fine: PO4 0.03 ppm NO3 3 ppm Ca 410ppm KH 8.4. I have another smaller one that looks very happy.any advice? Here are the sick one and thr you⁸