Cryptocoryne crispatula var. balansae is from Southern Thailand where there are limestone mountains, and the water can be very hard. Like many other Cryptocorynes it needs to acclimatise before growth starts in earnest. Leaves becomes 20-60 cm long and the single roset plant becomes 15-20 cm wide. 

Plant info
Type: Rosulate
Origin: Asia
Country or continent where a plant is the most common. Cultivars arise or are bred in cultivation.
Growth rate: Medium
Growth rate of the plant compared to other aquatic plants.
Height: 20 - 30+
Average height (cm) of the plant after two months in the tank.
Light demand: Low
The average or medium light demand of an aquarium plant is 0,5 W/L.
CO2 : Low
A medium need in CO2 is 6-14 mg/L. A high demand in CO2 is approx. 15-25 mg/L.