Spiru, this is quite puzzling. By any chance, you didn't bury the rhizome in the substrate, did you?

As for fertiliser, Anubias don't need it much, but it shouldn't harm them either.

Just one last question, did they have flowers when you bought them? Such a thing as you describe might happen if the Anubias were originally grown emerse (out of the water) and in bloom when bought.

Joseph

No i did not bury the rhimzones.this big anubia was attached to a bog wood in mid water,so it had very good light,in fact it had algae on its leaves.If only this plant had died i would have blamed algae but other anubias died as well that were in corners or shaded by hornwort.do you think i stop sera florena and switch to flourish by seachem?

and btw no they had no flowers,and i bought them from 3 different lfs

any advise?

Problem is I cannot exactly figure out what caused this.... Try switching fertiliser brand just in case, but I doubt that is the cause of the problem.

One more thing to ask.... What is your lighting wattage per gallon of water?

Joseph

my tank is 280ltrs.i have 2 tubes of 30w each.when anubias began to die i had 41w.i increased the light to 60w but they continued to die even those that were healthy with 41w.the tubes are phillips designed for plant growth(slightly pinkish light).The anubias that wre in the middle of tank had some algaemore or less,but even those that were in corners died as well.hornworth and ferns are very healthy.And about 10 days ago i introduced some vallisneria giganta but have seen no growth till now.is this normal being a fast growwing plant?

What is the temperature? Hornwort is cold water but Anubias does not tolerate cold water.

22 deg

22 C should be OK. I've kept them even at lower temperatures, though they do best around 24 to 26 C.

Joseph

Now,somene told me that it could be some kind of parasite that attacks the rhimzone,or could be fungus.better remove all anubias and give them a try in 3 months time.......