I have removed the female Krib and Ember tetras and placed them in another 2 separate tanks. I only leave the Black phantom tetras and the sole otto in the tank.
The following are the stuff utilised in the tank:
1. Soil: Clay loam (Price: RM5)
2. Sand: Holland Sand
3. Filter: Eheim 2213
4. Lighting: 55 Watt Dymax PL
5. Plants: Marsilea, Potamogeton gayi, Cryptocoryne wendtii, Anubias nana (maybe one of them is Anubias Petite) & mini Java fern
6. Fauna: Black phantom tetras & otto
7. CO2
8. 15 US Gallon (Standard 2 Feet) Tank
This is how the tank looks like originally:

This is how it looks like after the conversion. The water is clear since day 1:

This is the clay loam I use for this planted tank after failing to find top soil I purchased from the same nursery. I have decided to give clay loam a try as recommended by the salesperson. Purchased from Kelana Jaya's plants nursery:

I have added Holland sand at 4 corners of the tank to prevent double layer of sand and soil from being viewed. After that the top part of the soil is covered by Holland sand:

This is how the tank looks like on the 11th of April 2010 after adding water lettuce to shade the Anubias Nana and adding Rotala at the background:

