Budman- I didnt mean it as a criticism. Those are both very good articles by very bright and experienced folks.
Its just that in this hobby you have to make changes slowly. We get hung up on what so and so says, and this "article i read", and before you know it you are making constant changes, and dont know where to turn when something isn't going right.
Trust me, ive been doing this 20 years, and sometime have to consciously slow myself down. If you do that you will find the solution to your algfae. I guarantee ytou it will be simpler that you ever thought.
Example- I few years ago my 95% SPS tank was taking a down turn. I coudlnt fiqure it out. Corals that had grown from frags to colonies over 4 years started dwindling to nothing. With in 1-2 months: I changed bulbs (manufacturers, wattages, etc), I changed salts, I bought a $300 photometer for phosphates, I redid my fuge, changed mud, deleted mud, readded mud, etc. Did huge water changes in addition to my 10% weekly. Nothing was working. Frustrated one day waiting for my RO/DI to make more water for the next water change i noticed my 75G per day RO/DI was not meeting that capacity. It was making a quarter of that. I unplugged the input and noticed a red tinged dribble coming out of it, instead of the city water pressure I expected. I check the main valve, lol and behold, it was not fully open. Did I forget to fully open when I changed RO/DI filters, did my water pressure change?, I dont know, but after fixing this unforseen issue the few corals I had left that had browned out, came back to life with in a few DAYS. Unfoutrunbitly I ended up with a bigger grave yard.
Long story short. Look at the easy stuff first before getting into the more complicated issues.
Sorry for the rant, I just tired my self with typing LOL>.