水草情迷

究竟細化杯底部個隆有洋用呢~

是入水孔, 無水就見唔到D咆啦

咁係d氣泡會o係個隆到出尼架喎~

你用邊隻細化器呀, 用陶瓷片個o的唔會有孔係底喎. 有孔就谷唔到co2係陶瓷片出氣啦. 你係唔係用緊"蛇管" 呀. 唔算係細化器呀, 都冇細化到.

_________________
多多交流, 多多研究, 多多搜尋
我的水族相簿

I think you are using 細化杯 combined with about 3-5 circles of 蛇管 below. The 細化杯底部個隆 you are talking about should be 蛇管底部個隆有!? right?
when the whole 細化杯 is full of water, and CO2 bubble is coming out from the 蛇管底部 and running into the 蛇管, bubbles push the water in side the 蛇管 out from the top of 蛇管, and other water get back to the 蛇管 form 蛇管底部個隆.

咁即係有咩用呀?

allow co2 bubble to run in and out from 蛇管 fast........
otherwise you will not see any running co2 bubble, just a 蛇管 with full gas.
actually, the 蛇管 and 個隆 are for visual only not practical use