Green Dust Algae - The Planted Tank Forum
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post #1 of 4 (permalink) Old 08-15-2012, 10:13 PM Thread Starter
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Green Dust Algae

Too keep Green Dust Algae at bay , should I up my
Potassium Sulfate (K2SO4) or
Mono Potassium Phosphate (KH2PO4)

Is there a way to tell each apart from each other?
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post #2 of 4 (permalink) Old 08-16-2012, 09:26 AM
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Did you mean how can you tell pot. sulfate apart from pot. phosphate? The bags aren't labeled? If not, it's pretty easy to tell, the phosphate looks like tiny crystals, like salt almost.....then the sulfate is like baking soda, or flour like. As far as your green dust algae, I'm not really sure what you mean. I would test your phosphates and see where they are at before you add any more. When I add my ferts, I test my water to see where I am at first, then add accordingly. If my phosphates are above like 1.0-1.5, I don't add any. Same with my pot. nitrate. If my nitrates are above 20ppm, I don't add any. The trace I add twice a week and the pot. sulfate I add when I add my ferts after my weekly water change, and that's it. Once a week. Do you have any pictures of this green dust algae?
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post #3 of 4 (permalink) Old 08-17-2012, 02:44 AM Thread Starter
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To what I read is that Green Dust Algae is cause by low Mono Potassium Phosphate (KH2PO4)
I think I mark my canister wrong an put Mono Potassium Phosphate (K2SO4) on the label . So thinking I had the right one , I get a big bloom of green dust on my glass.
So now I got to try to tell them apart and re-do my label .
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post #4 of 4 (permalink) Old 08-17-2012, 05:29 AM
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GDA, near as I can tell, is not caused by low PO4.

Nor K+, nor any dosing routine I'm aware of, or not dosing at all.

Maybe CO2, maybe O2. etc..but not ferts......

Tom Barr
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