水草情迷

I want to ask:

1)how much Watt of the heater do I need for a tank containing 150L water in aqua-grass planting ??

2)how much electricity charge to run a 150 W heater/day?

3)10cm x 10cm x 10cm = ???Litre

1) 200W is better
3) 1 公升

1. 150升, 起碼都 200w 啦.
2. 要計埋開幾多個鐘架嘛, 150w * xx 小時 = yy w(1000w就係一度電), 睇電費單就知幾多錢度囉.
3. (10x10x10)cm/1000 就係公升囉.