Quote Originally Posted by badflash
Flood & drain is the way to do that. Takes some balance, but is a preven method. Wands may work in media free systems, but will clog quickly in any gravel or media system. In pure water systems they must be removed and cleaned often.
I haven't had to clean my wands at all .... they're in clean water ...... for a GB, I will just use some airline tubing with pinholes in it ........ I got a lot of airline for oxygen, so that's what I'll poke the holes into ....... I've put an airstone in one of my GBs to test the theory, and all the plants near it have perked up and greened up, so I'm thinking that my lower GBs aren't getting enuff oxygen.