Throughout the year, I have had problems with supposedly one of the easiest plants to grow --Rotala sp Green. Although increasing iron/traces seemed to be the solution last year, I can't seem to replicate the same results this year. Here are the aquarium conditions:
currently 6.15 wpg PC (2x55w PCs + 1x13w PC)... I'm experimenting.
Symptoms actually became WORSE when temporarily switched to 2x20w NO Flos for a week (2 wpg)
Pressurized CO2 being used... CO2 triple checked to be ~30ppm
NO3: ~5-10 ppm
PO4: ~1-1.5 ppm
Flourish 3 mL daily, Flourish Trace 3 mL daily, Flourish Iron 3 mL daily = 3x7= 21 mL of each supplement every week (that should be enough!!)
No additional K+ supplementation
Symptoms: Rotala sp Green produces small leaves which curl downward and corkscrew slightly. Older leaves are very dark green. Rotala sp Nanjenshan produces very short, scanty leaves with brown dead spots of necrosis.
Plants like Blyxa japonica, Tonina fluviatilis, H. zosterifolia, Ludwigia arcuata grow well without any sign of deficiency.
I will post pictures of the symptoms in a few hours.
Here's a picture showing the Rotala sp Green. Notice the curled growth.
Close up of a stem showing the deficiency.
Rotala sp Nanjenshan. The plant isn't as "fluffy" as it should be, grows slowly, and has many dead brown spots at the internodes and along the stems.