My aquarium just passed its 3 weeks marks since it is cycling. By the 10th day the diatoms dissapeared (they started on 3rd or 4th day, with a peak at about 1 week, and then visibily loosing strength).
However, green algae started to grow slowly. I am expecting it since I read many articles here about the cycle and so on - but now it is everywhere; what I can't do is tell the difference between a normal / expected algae bloom and what I currently see in my aquarium. I have 4 other FW aquariums and this amount of algae would would be almost impossible to have (since I do take care of them).
Is this the normal cycling algae bloom or is it much worse ?
Few pics below:
Overview: it's everywhere, glass, side classes, sand, rock..
Closeup of the front glass:
Closeup of the rock closest to light:
I have changed the water a week ago (so after two weeks); although I started with tap water, I got the RO unit installed meanwhile and the WC was 50% with treated RO. I have also added some trace elements and bacteria (although I have no corals and no clean up crew, but maybe a reflex from the other FW aquariums where I add some food to continue the cycle).
What I noticed is that the algae really started to grow now, much stronger than before. I would have expected a decrease since the amount of nutrients dropped with the 50% water change with RO water, but apparently not.
Does this look like a normal algae bloom that is expected for cycling ? Shall I wait till it will die, or should I get some snails - I was planing for at least a month of cycling, but ... My alarm bells (from FW tank) are ringing like crazy and I'm confused if this is normal or not in reefs.