Hi anyone experience could advise me of any potiential problem i be facing or any tips as a beginner. i am still on trial and error now. the following is my tank spec:

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Tank Dimensions (LxWxH, specify units): 1 feet rectangular

Lighting Intensity(No of Watts) : 12W
Number and type of Lighting (FL/PL/MH) : 2 X T5 12000K
Age of light bulbs : Less than 3 months
No. of hours your lights are on : 8

Liquid fertilisers Used (Product name. E.g. Seachem Flourish) : SeaChem Flourish, SeaChem Excel, SeaChem Potassium.
Fertilization regime (Frequency and amount per dose) : All Half the recommended dose. Seachem Flourish weekly, Excel Daily, Potassium 2 time a week until i see no yellow leaf then i'll stop.

Type of Filter (overhead/internal/canister, Product name/model if possible) : HOF
When was the filter last washed : No since it commission
Filter media used : Bio sponge, crushed bio ceramic rings, sponge(white)
When was the media last changed : last week
What was changed : Sponge(white) only

Age of setup (i.e. since initial setup or last major re-do ) : 3 days ago

Water change frequency : intended weekly
Amount changed : 10 - 20%

Water surface movement (None/gentle/turbulent) : gentle
Circulation (None/gentle/turbulent) : gentle

Tank Temperature : 27 - 28

Soil : Planta powder and Advanced soil as base.

Plant used :
Marsilea hirsuta
C. Wendtii Mioya
Staurogyne
Zenkari Red
Mini fissiden tied on rock and drift wood
Taiwan moss as backdrop