Plants melting in an established tank
I posted this over in my journal but more people will probably see my question over here. Sorry if this is frowned upon but I need help before everything starts to go.
I don't know what happened but my crypts are melting at a rapid rate. Within 1 week this plant has pretty much melted away. I noticed it mid week and by Sunday this is what I have left. The marsilea hirsute started to die off also, but only in the one spot. Today I noticed more spots of the MH starting to go brown now too
The crypts were putting off runners all over the aquarium until this happened.
The only thing I changed in the past week was floating cutting of a coleus plant next to my pothos cutting. Didn't really think much of it until things started melting. Dosing, lights, water changes and C02 have all been constant. Nitrates were around 40ppm, phosphates around 2ppm.
I did a 60% water change today and vacuumed out a bunch of the dead leaves and stuff that I could. These photos were taken after the water change. Hopefully this is enough to fix whatever is happening.
The cutting was taken out mid week when I noticed the issues.
Anyone have thoughts?
The last photo was from 6-15-2020 to see how the plants did look.