Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
Have you used any chemicals on the leaves to combat algae perhap's?
Looks something like what I experienced after using peroxide on a large anubia I have that has grown to the surface and sitting directly under the light on top of the tank, started to get some algae around the edge of those leaves closest to the light.
I see some new leaves that look healthy and also see where some leaves/stem's have been cut/removed.
Might move the anubia to shade area for a while if possible, and see if new leaves continue to sprout. I would cut the worst looking leaves from the plant and cut with sharp scissors or razor blade at an angle rather than straight across cut.I cut house plant's this way and is why I also cut aquarium plant's same way.(maybe not really make a difference but seem's to for me).
Can't really see any other plant's in photo very well but if it is only anubia that is affected,then with CO2 resuming and good fert routine along with maybe not sitting in direct light,the anubia will bounce back albeit slowwwwly.
I routinely cut away old leaves on my anubia that seem to start deteriorating a bit around the edges after a year or two to make room for new leaves.
My thinking /experiences with the anubia(s) I have ,is that old damaged leaves seldom repair themselves so I don't want what nutrient's I use going to try and repair that which slowly seem's to get worse rather than better.
Would much rather remove the poor looking leaves and thus allowing nutrient's to feed the new leaves .
My two cent's.