I have 2.75 wpg over my 20 high. I use 100% flourite. I am having a problem though, as my wisteria and radican sword don't look top notch. My wisteria's older leaves are getting cupped a bit. They are darker green than the newer leaves, and then they curl down a bit.
My sword plant is worse, IMO. New leaves grow in lighter than normal, and their veins are brown. Older leaves are a nice green, but wavy. Some of the older leaves have yellowish spots on them.
My iron is kept between 0.25 and 0.5 ppm. Phosphate is always kept at trace, due to me not having my phosphate fertilizer yet. I would like to keep it at about 0.5 ppm. I dose fluorish at about a mL a day. I also dose potassium at about 2-3 ppm a day. Is that too much or too little? Should I dose heavily after a water change? Also, I will start adding fluorish trace at about a mL a day. c02 is always between 20 and 30ppm. gh is about 7.
So, what could be the problem, and how might I fix it?