I've finally gotten my screen going. Took much longer than my first build by months. Perhaps I didn't rough up the canvas enough. Either way the hair algae in my DT is on it's way out.
I've read it here before that algae is algae and will work, but hair is optimal.
I have what I've heard called "ice" algae growing pretty damn thick the last two cleanings.
I've followed the recommended "scrape off everything" to the canvas while leaving only GHA bits.
Two things: it's odd that this algae should dominate (I'm talking two inches a side) in so short of time, I have none in my DT, just GHA. Also, it's easier to clean than GHA.
Any comments, conjecture would help ease my mind.
Set-up is DIY acrylic, 4 CFL floods. 8x10 screen with ~800gph.