08-31-2020, 09:52 AM
Join Date: Jun 2020
| | Brown (and green) hairy algae
I have a new tank (almost 4 months old) and I had (have) some problems with algae.
It's a 50 liters cube (40 liter display) with the Walstad method and after 1 month I started to see some brown hairy algae on the taller plants and in the roots of floating plants.
On the 2nd month I did my first water change (12 liters) and on the next day I saw an explosion of brown algae (now almost everywhere), every week I scrub the algae but it always comeback on the next day. (pics 1 and 2 are 2 days after a clean up)
After almost 1 month i decided to test Seachem Phosguard and like magic the algae vanish in one week (I removed it after that), but now I have another problem, on the same spot a green hairy algae is growing. (pic 3 is one week after a clean up).
I have a 10w led lamp that is on 8h a day (4h on, 4h off and 4h on) and besides these hairy algae I do not have any problem with algae.
The water here (São Paulo/Brazil) is very soft (4-5 dgh) and the plants are not so fast growing so maybe they cannot compete with the algae.
Did anyone have problem with these algae? There is a better solution than Phosguard? Maybe the Phosguard cause the green algae?