To ease the overcrowding situation, I decided to seperate the pH neutral Cryptocorynes into a separate tank. I first bought a 2 feet 'GEX' tank (60cm x 30cm on plan) for S$22 without a cover and a S$18 2 feet light (with 01 X 15W FL).
After taking measurement of the dimension of the opening at the top (57cm X 27cm), I went to the photo frame shop at Boon Keng to fabricate 02 X 56.8cm X 13.4cm 5mm glass cover for a total of S$8. Luckily they could fit into the rebates after I brought them back home! The back piece will be permanently placed in position to support the light, the front piece could be opened easily whenever required using suction pads.
I transferred all my pH neutral Cryptocorynes into this tank and filled the tank with 3 bottles of distilled water before closing up the tank. Hope they will continue to grow well!