I have a low light (1.5wpg) planted discus tank,kept at 85f.(NO CO2)
Before it was a discus tank,the same plants where kept at 76f as a community tropical tank.
Since the discus set up im now Useing 100% ro water,which then i add RO right too,to get my GH back up to 2gh.
Then i add ph stable to raise my KH
Now my problem is....my java ferns arnt doing very well (see pic)...thay are going brown and holes are appearing in them.
Could this be a nutrient deficiency ??
The RO right contains traces and twice a week i add flourish.
MY n03 is 10ppm p04 is 1ppm
should i BE ADDING k?..but bearing in mind this is a low light tank.
OR.....could this be due to the rise in temp from what thay have been kept in 76f to 85f?
also is it safe to add K to a discus set up?