New Surge Toy for Small Tank Owners

[Andrew]

Small tank owners could definitely give it a shot. This equipment prevent adding powerhead into a limited tank space for small tank owners. It prevents adding additional heating source into your tank. The built in temperature controller also helps eliminating the ugliness of the heater.
Take a look:
http://www.tetra-fish.com/tour/virtualtour.html
Fun idea, do not know how effective it is, never used it myself, FYI only.

 

[huatuo]

啊~ 這有點像是以前所謂潮汐式的上部過濾器呢~
只是我在想~ 缸子內會不會產生很多氣泡呢？
蠻有趣的~ 有機會diy一個~

 

[Andrew]

Another one:
http://www.wave2k.com/

 

[bear]

看一下.跟蹲式馬桶的水箱原理差不多