Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
Don't know how much is too much,what is being dosed at what level's.
Would do as OP is doing, and maybe weekly 50 % water change.
Just my two cent's.
Have personally never seen plant's improve by limiting fertz .
Would rather add more plant's,perhap's some fast grower's temporarily.
I wonder if temperatures of some plant's,as opposed to other's might also be something to consider?