One thing I have noticed on most heavily dosed tanks, is that they all have/had BBA. Maybe too much Po4?
I have meet every algae that exist, but never BBA and I think it's due to I never dosed so much Po4.
Just a thought. Every journal I follow (Burr, Gregg, Slipfinger) I see BBA issues.
Maybe it's also some sort of imbalance.
I think it is flow related. It seems to grow where flow is the highest, in my very limited experience with it.
The source of BBA is a tough one to narrow down. A quick search of TPT and you'll find people blaming CO2, too much/not enough flow, a fat racist orange old man, PO4, Fe, all micros, organics, and refugee invaders.
In my experience it is related to flow and organics. I find it likes very low flow and very high flow, but no so much in between. It grows on the glass in places with low flow. Grows on lower leaves that are getting crowded out and getting low flow. But also grows directly on the return outlet for my canisters, the "intake" for my circulation pump (when I was using it), and the airline that runs to my airstone, and is worst closest to the stone, where the bubbles stream passed it fastest.
I have found three ways of dealing with it:
1. Do nothing. I've had a couple tanks where it popped up pretty badly, just kept with my normal routine, and it went away after a few months. Don't know why it started, don't know why it left.
2. H2O2 and/or Excel. Both work pretty well at killing it, and it's fun to see it fizz and then turn purple and die. Doesn't address the underlying cause.
3. Better maintenance (plus maybe some H2O2 or Excel
). Vacuum substrate, trim old dead algae'd leaves, clean filters regularly, optimize flow (not too much, not too little) around entire tank.
Every aspect of a tank, every nutrient, is somehow connected.
"Balancing" things is nearly impossible.
I agree with the first statement, but am not on board with the second haha.
Finding the balance isn't easy, but it's far from impossible. Mulder's Chart is a great place to spend some time if you're struggling with nutrient balance.