Just recently I've found that plants have been melting/dying. Lots of the Blyxa has had it, most of the Rotala, the P. stellata, E. sp. 'Mini', Alternanthera reineckii 'Mini' as well.
I'm starting with Ei salts today, which I shall mix with water and dose daily. I've invested in CO2 kit and will be using an inline diffuser through the left spray bar. When funds permit, I shall add a second inline diffuser, to the bar on the right.
I wish I hadn't used the gravel. It is quite a nuisance as it mixes in with the sand. A job for me soon will be to remove as much as possible and replace with the spare black sand that I have.
I lost one fish, Sparky the M. praecox; she was actually raised from an egg that came attached to a piece of bogwood. A bit disappointing, but it means I can change the plan for the other tank that I got hold of recently. More on that in my other journal (starting soon)