Ok, firstly here's all the particulars: I set up the following tank about a month ago: 75g Perfecto Aquarium with stand Filters: Eheim 2217 x 2 Light: Current USA Nova Extreme 48" 2x54W T-5 (one SlimPaq 10,000°K bulb and one SlimPaq "Freshwater" bulb 6700K, I guess.) 220W, or 3.9wpg. 9 hours a day. Air pump: Tetra Whisper 100 Air Pump) with air stone. C02 set-up:20lbs cylinder, regulator, solenoid, needle valve, 1 diffuser (one on each end of the tank planned. Another on order now) , Pinpoint pH controller. Substrate: (Cable heater) 20lbs of Caribsea Tahitian Moon Sand 25lbs of bagged laterite 80lbs of Eco complete Temp: 77F, pH 6.6 (w/CO2 addition), GH around 10-11. KH, the API test kit solution turns yellow right away, so either I have a KH of zero, or the test kit is suspect.. With every WC (20% once a week), I mix tap water (pH 7.8) with demineralized water to get a pH of approx 6.6, and I add it slowly, 3 gallons at a time. The pH controller is set for 6.6 (HI-6.8, LOW 6.7), and goes on at the same time the light does (lights are on for 9 hours a day), and the air stone goes on for 5 hours a night. The pH goes from 6.6 when the CO2 and lights go on, to a 7.0-7.2 at night when the air goes on. Swings in either direction are gradual, with the addition of air or CO2. The drop checker is reading GREEN, but I am thinking of getting a Lamotte test kit to see what my actual ppm is.. I add a capful of Flourish every day, as wll as a capful of Fourish Iron and I have peat and Boyd's Chemipure Excel (on the advice of a freind, even though I'm told that sucks up the liquid ferts you add) in my filters.. Here's a recent shot of the tank (admittedly before the staghorn REALLY took hold): http://i285.photobucket.com/albums/ll54/dougzdanivsky/tankoct16082.jpg And here's some close-ups of the string and staghorn algae issues I'm having (more recent pic of the staghorn infestation): Here's the current stocking: 1 BN, 4 otos, 6 pandas, 2 yo-yos Oh, and there is INDIRECT sunlight in the room, coming from a NORTH facing window.. Now that I hopefully have all the details covered.. Why am I having algae issues???? I was told on another forum (Plant Geek) it's because I haven't been adding macro ferts, and that I should start immediately with an EI dosing regime.. Is this right? I had always thought that that the more nutrients in the water, the more algae.. Can someone explain why this is not the case? I was also told that the more fish I have in the tank, the less I need to worry about macros, as they will supply them with their waste, etc.. Is this true? And if so, once I'm fully stocked should I discontinue or scale back with the ferts? AND I was told I have WAY too much light on, and way too little CO2.. Is this so, do you think? I also plan on adding 2 SAE, 4 dwarf cichlids (cockatoos), and 15 cardinals. Regarding the tennelus: I have no idea how I'm going to get it off them.... They look to be too forgone for anything except snipping them out in their entirety.. If I cut the affected tips off however, I've noticed, it grows back a reddish-yellow.. The other plants I can take leaves off and they'll grow back the same, but not with the tennelus.. Hope to hear from you soon, Tom!!