Why is my APP dying?

[pantroglodytes]

Hello all,

Just rekindled this old passion. Kind of lost touch. Recently my plants seemed a little pale and upon research, I bought Seachem Iron and Potassium and have been dosing every alternate day. Lights are on every 4 hours interval with 2 hours rest in between. CO2 is about 2 bps and temperature stays at around 26-27 deg c. Upon dosing, I realized that all the other plants did very well as seen in the second picture as compared to the first. The APP did not seem to respond to the dosing somehow. The leaves are translucent despite the dosing. What could be the reason why? Thanks!


P.s what are those plants in the middle? can someone help me id them please? thanks. I call them the funny looking plants.

[barmby]

According to searches in AQ previous posts, APP can melt like a pile of $hit if nitrate is not sufficient.