[Gab79]

Hallo, at first sorry for my english. Since 3 weeks i have a problem with a sort of slime black algae. That algae appears as a patina on the superior part of plants specially during the lighting period (8 hours/day). I can easily remove that patina but the day after the problem persist.
What i have to do?

 

[Gab79]

Here are my tank parameters:
Tank size: 180 net liters
Lighting: 4x39w T5 6500K 8 hours/day

Water paramaters:
KH 4
GH 6
Ph 6,6-6,8 (i am using Co2 24h/day)
No3-Po4: i am adding them by KNO3 and KHPO4 solutions to reach +/- NO3 5 ppm PO4 0,5


At microscopic (an old and not powerful microscope..) view that patina appears as a series of globules with a dot on the center.
Thanks all.

 

[Gab79]

Thanks all for the replies.
Before applying an antibiotic treatment i tried with Protalon 707 ( produced by Esha) and 2 days blackout. Actually the situation is ok. I can see few residuals of the slime only on some plants and always in the same point. I hope in a complete solution. This is a pic of 2 days ago. I made some changements especially for the glosso "bed" and i'am waiting the complete re-growth.