My tank is fairly established - 15+ years now. I some had algae issues years ago but nothing in the past 4-5 years, just a weekly cleaning of the glass and occasional scrubbing the fluval ladder and big rocks. I'm running a fluval ladder co2 system (home measurements - 1/8 tsp yeast, 1tsp baking powder, 1/2 cup sugar in the reactor), finnex planted+ 24/7 on auto and a 65w cfl retrofit in the canopy running 8 hours per day. I haven't measured anything (ph, kh, co2 etc) in years. The thing has just been running smooth. We went out of town for our anniversary (25th!) and I came home to this. I must admit that I didn't pay much attention to know if it started before we left for the week. There is a hair like algae on the anacharis and wisteria and on the leaves of the swords. Also a bright green grasslike growing from the base of the swords. Most of it is on the plants toward the front of the aquarium.
I would appreciate help with identification and suggestions for treatment. I guess I should also mention that the only changes in the tank in the past month or so is the red lugia in the front right (from petco) and I quit adding Flourish Excel, only dosing weekly with Flourish now. I had heard that the excel could be causing the black stems on the anacharis. Based on some reading that I've done in the past two days, I've cut off the effected stalks, scrubbed some of the rock and turned off the 65w light completely. I'm not sure what else to try so again, thank you in advance for any direction you all can provide.
I would appreciate help with identification and suggestions for treatment. I guess I should also mention that the only changes in the tank in the past month or so is the red lugia in the front right (from petco) and I quit adding Flourish Excel, only dosing weekly with Flourish now. I had heard that the excel could be causing the black stems on the anacharis. Based on some reading that I've done in the past two days, I've cut off the effected stalks, scrubbed some of the rock and turned off the 65w light completely. I'm not sure what else to try so again, thank you in advance for any direction you all can provide.