does it matter if bushy nose pleco will eat GDA or ignore it depending on their age???
i cleaned my entire glass with Excel and sprayed some on rocks, it seems to clean the GDA off really well, there is some GDA on the rocks and plants, i haven't seen Bushy nose working much on plants or rocks, they seems to be ignoring them, always working on glass. they seems more active when lights are off.
i also have done an experiment for 2 days, i took 2 glass, one with tank water and one with 100% RO water, i left them outside in full sunlight all day for 2 days straight. but i did not witness any GDA or other algae in both glass. we have to remember that sunlight is many many times powerful and intense than our tank lights. this suggest strong light isn't the cause of GDA, it comes from somewhere else. i have also confirmed in my recent thread that having 0ppm of PO4 and GDA still flourish. MCI was wrong on This finding, including Ca/Mg ratio. the only thing i can confirm is adding extra Mg is beneficial to prevent GDA. am not saying MCI doesn't work, but i can only confirm things i can test. i would also like to repeat these test to be 100% sure because test kit could be wrong, plus i did not get any GSA, which for sure can confirm this. i will give another chance to MCI.
Yes, much like those lazy SAE's ignore the BBA and eat all your discus' food or fish food, then sit and bully everyone once the food is fed.
Well, not quite as bad, but.........
Gold nuggets are less prone to this as are Sturisoma. Otto's, well, they have issues. Maybe some of the Otto subfamily might hold promise. I've had a few.
Yes, BNP do most of the work at night. They like the glass and smooth surfaces. If the GDA is after the plants and rocks a lot, something else is up.
You have it pretty bad.
The glass issues are typically the hardest issues for most folks with GDA, if it's hitting the rocks and plants also....
I agree with you, stronger light is not the issue, you can slow the GDA by reducing light lower.......some go down to 30 umols etc, but this is not good for plants either, they grow slow or look bad then for many stem species.
Sunlight has a lot of UV and it's much much more intense, say 20X what the strongest aquarium lighting for plants might be, if you took a plant and exposed them to that much light, it'll fry many plant species also.
I'd hoped that the low PO4 would do something to GDA, but that is consistent with the hobbyists not being able to limit algae with PO4 limitation, thus goes back to my old hypothesis with Paul Sears and PMDD: you limit the plant growth with low PO4, thereby applying Liebig's law: PO4 is now a stronger limiting factor than CO2.
Mg is commonly limiting in low GH/KH tap waters, so larding a bit more into the CMS+B trace mix is helpful and might explain some positive benefits to dosing the Traces daily since it has Mg in there(not much). Mg limitation is very plant responsive, within a day or less you'll see noted improvements.
I've gone to about 20-25 ppm and then up to 50 ppm or so with Mg.
I think anywhere between say 2-20 ppm is fine.