Anubias not doing so well

[Mikebaker]

Hello everyone, i have a problem, all of my plants are doing great except both varieties of anubias that i have keep shriveling up, and my hydroctyle verticillata keeps getting black algae on it, not hair algae, just spots on the leaves.
I have:
alternanthera reineckii
lilaeopsis novae- zealandiae
crypts
amazon and broad leaf swords
anubias barteri
another larger anubias species i can't remember the name of

Water params:
temp 83 degrees
ph 7.2
kh 12 degrees
ammonia: 0
trites: 0
trates: 15 ppm
phosphates: 1ppm

Tank setup:
77 gallon
1.1 wpg with 18000k powerglo bulbs
diy co2
fluval 404

stocking:
4 4" discus
30 neon tetra
4 flying foxes
3 dwarf gouramis
1 feeder guppy( i dont' know how he got in there, and i can't catch the little S@!t)
I use root tabs under the swords and do small doses with plant gro npk and excel once a week with my pwc. any help is much appreciated. On an unrelated note, does anyone know of a good algae eating fish that can be kept in a planted tank with discus.. thanx.

 

[ringfinger]

These are a couple questions that come to mind...

Is the rizome buried beneath the substrate and rotting?
Do anubias do well in warmer water?

Everything else seems to be in good order.

 

[newfound77951]

I would think SAEs would be OK with discus, not totally sure about the temperature, but temperament-wise, mine are pretty mellow and don't bother anyone.

 

[Wizzard~Of~Ozz]

Most anubias upper temperature is 30c or 86F.. you are very close to that temperature.

I have not seen anubias shrivel.. I would think salinity but that's doubtful if the other plants are doing well. Most like it's too hot for them.

 

[malkore]

Your CO2 is low also.

 

[Thebluyak]

hey use albino bristlenose catfish with your discus for algea clean up, im in the process of doing a 55 gallon discus planted and thats what you are supposed to use. Plecos can attatch themselves to the side of a discus and eat the slime coat. Have you had any problems growing the discus out in a planted tank? also have you had any problems with only having 4 instead of 5 or 6?
thanks
Ryan