I have been having problems growing most stem plants. The new growth is either very small, twisted, or stunted. It even shows up on easy plants like wisteria, ludwigia repens, and rotala rotundifolia. It shows up worse on limnophila aromatica.
Here is my setup:
40watts of NO flourescent lighting
pressurized co2, i have a 3-way manifold on my regulator and one line goes into a mini vortex reactor, and the other line is attached to a chopstick which is fed into the intake of a powerhead for some mist effect.
kh - 3
gh - 6, tap water gh = 3
tues - 50% water change, 1/4tsp baking soda, 1/2 tsp epsom salts, 1/4tsp kno3, 1/16tsp kh2po4, 1/16tsp k2so4
wed - 6ml csm+b
thur - same as tues
fri - same as wed
sat - same as tues
sat - same as wed
sun - nothing
I'm pretty sure my co2 and ferts are at good levels, so I'm thinking that maybe my GH is messed up. I've been adding 1/2tsp of MgSo4 after water changes for several weeks already with some good results, but my plants still stunt. I just got my water quality report today and found out I have 14ppm Ca, and 4ppm Mg. My test kit gives me a GH of 3. Do you think these levels are too low? Maybe my plants are suffering from Calcium deficiency? Should I start adding some CaCl2?