Hi after a lot of algae problems , i lowered my light untill 1w/g (2 bulbs ) . Tank 80 G. The thread algae are gone now and i only have fuzz algae. But unless EI and Co2 , i have plant issues. Soms stem plants have deformed new growth (hygrofila stricta) and oter green stem plants have tissue (yellow/brown) problems between the leaf veins. Some leafs turn reddisch. Ca deficientie doesn't seem the issue because gh is 9 and 1/w i add 1 teespoon gh booster. Ph controler at 6.8 kh 5/6. Dropch. is in a goood range. Could too much EI cause these problems????