Quote:
Originally Posted by Delphinus
How old is the media? It might not actually be a leak (well, it could be, but not necessarily). It could also be that the media is starting to compact and the pump is unable to recirculate - thus in the area of low pressure (suction side of the pump) the bubble forms and grows. I find if I let my media go too long I get this phenomenon. It's really hard on your pump too BTW.
Also I'm curious how you have your reactor fed? Typically the effluent rate should not be affected by a bubble in the recirc chamber. That's another reason I'm thinking it may be media clogging...
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I was going to suggest the media aswell, just didn't want to type that much--- good answer, Delphinis