I am very satisfied with this reactor. The length can be adapted to the needs, so arrive almost no bubbles above. I've been using the reactor with an extension kit. To clean, I use occasionally Danklori * which is diluted with water 50/50. Here just put the parts. After about 3 hours, the maximum effect is achieved, but generally this time is not needed. Then !! rinse well because chlorine !! to remove any supportive with water conditioners or even with vinegar to the chlorine.