Pieces of plastic egg crates are used to create a raised platform on which the pots of cryptocorynes sit. Some fishes (wild bettas and gouramis as well as boraras) are kept therein to prevent mosquitoes breeding (if any). The water in the main tank has a pH of around 4.5 by submersing a bag of peat moss (I used 'Horti Moss' which can easily be purchased from NTUC supermarket) inside for a number of days. The water level is generally about 2cm below the substrate top level. Black water extract is also added to condition the water.
2 separate plastic tubs are also placed on the raised platform to allow me to experiment with plants requiring less acidic water conditions and yet housed in the same tank to maintain the humidity level required. The pH of the water in these tubs are close to neutral, between 6.8 to 7.2.