Plant turning yellow brown after 2 weeks or so

[chansh]

Hi,
I have this setup almost 2 years as to date, my plants don't seems to stay green and survive for 1 month or so
Can anyone give advice what I have not observe or something not right here?
The fishes are ok and have been staying on a year

CO2: 2-3 bps
using Ehiem 2215.

Clean the filter every half yearly or so

I don't see water condition abnormality.
Change water 30% every week.

Perhaps I should remove the ada soil altogether?

see pics here.


Thanks in advance

Attached Thu

[Kingelliot]

Which plant not green? All are green from what I see here.

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[Xiaozhuang]

Half the plants you bought are non-aquatic...

http://www.practicalfishkeeping.co.u...n-the-aquarium

[chansh]

here are the close up views, showing signs of deteriorating soon.

[chansh]

How about the grass wrapping on the drift wood at front center?
will this grow and strive under water?
That I grew it dry from seeds planted in the drift wood in a sealed up tank condensation before putting under water