I tell you what. I use dry ferts and I'm dosing about 4 times the recommended dosage and I'm still loosing plants. I've been thinking its co2 issues for ages in my big tank, but I have a smaller tank with 13 times turnover and a lime green drop checker and Ive been loosing leaves on my Stauro.
I'm going to use the tropica ferts and if everything starts growing like mad then I'm going to be throwing my dry ferts in the bin.
Its worth trying, i would also ensure your co2 is getting to the plant level.