[gnovince]

So this is a tank that after a year of neglect I'm finally getting back into it. It's been about 2 weeks of actually caring for them in the picture. Got co2 steady, got new test kits, Nitrates and Phosphates were very high. After water changes got N to around 20-30 and P around 2-3 ppm. I didn't noticed this yellowing of new growth until I seen tank with lights off. So what do you think? Fe deficiency? or maybe something else? Possible K deficiency? I just dosed K yesterday the 1st time in past 2 weeks also.