Macrandra problems

[borman]

Hello.

Here I post photos of my friend.
He have very big problems with growing Macrandra and Rotala SpGreen

Here his tank data

Tank vol 230 l
Light 168 wt step method (2 hours-90w+6 hour 168wt+2 hour 90wt)
CO2 - Pressurized more then 30 ppm

Ferts (all daily dosing)

NO3-1,6
PO4 0.154
K-3.0

Mn 0.0206
B 0.0015
Cu 0.0011
Zn 0.0034
Mo 0.0004

Fe 0.04

KH 2
GH 10 (Ca 52 Mg 12)
Ph 6.0

Here the photos of RM made 24/06
and then made 5/07 (date on photo)
Nothing changes (i mean in routine) but results ..... :-(
Any thoughts /

 

[Philosophos]

What's your water change cycle?

At first glance, I'd go through evaluation on your CO2 levels, followed by calcium. Your plants are failing to create healthy cell walls. Focus on the CO2; "seems like 30ppm from my drop checker" and the like isn't enough on its own. Watch the plants, check your distribution method. Potassium might be short too.

What units are you listing there for your dosing? PPM? What's your water change schedule?

-Philosophos

 

[VaughnH]

As the plants grow, and increase in mass, their need for CO2 and other nutrients grows too. But, the increased plant mass tends to reduce the circulation of water in the tank, making it hard to get CO2 rich water to all of the plants. I'm guessing that is the problem, since this type of problem seems to always come down to a CO2 deficiency.